mirror of
https://github.com/gosticks/DefinitelyTyped.git
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1077 lines
31 KiB
TypeScript
1077 lines
31 KiB
TypeScript
import * as R from "ramda";
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import { Dictionary } from "ramda/tools";
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function double(x: number): number {
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return x + x;
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}
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function shout(x: number): string {
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return x >= 10 ? "big" : "small";
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}
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class F {
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[k: string]: string;
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x = "X";
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y = "Y";
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}
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class F2 {
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a = 100;
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y = 1;
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x() {
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}
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z() {
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}
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}
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(() => {
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R.propIs(Number, "x", {x: 1, y: 2}); // => true
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R.propIs(Number, "x")({x: 1, y: 2}); // => true
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R.propIs(Number)("x", {x: 1, y: 2}); // => true
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R.propIs(Number)("x")({x: 1, y: 2}); // => true
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R.propIs(Number, "x", {x: "foo"}); // => false
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R.propIs(Number, "x", {}); // => false
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});
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(() => {
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R.type({}); // => "Object"
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R.type(1); // => "Number"
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R.type(false); // => "Boolean"
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R.type("s"); // => "String"
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R.type(null); // => "Null"
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R.type([]); // => "Array"
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R.type(/[A-z]/); // => "RegExp"
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});
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() => {
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function takesOneArg(a: number) {
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return [a];
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}
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function takesTwoArgs(a: number, b: number) {
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return [a, b];
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}
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function takesThreeArgs(a: number, b: number, c: number) {
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return [a, b, c];
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}
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const u1: (a: any) => any = R.unary(takesOneArg);
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const u2: (a: any) => any = R.unary(takesTwoArgs);
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const u3: (a: any) => any = R.unary(takesThreeArgs);
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};
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/** R.__ */
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() => {
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R.concat(R.__, [4, 5, 6])([1, 2, 3]); // [1, 2, 3, 4, 5, 6]
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R.concat(R.__)([4, 5, 6], [1, 2, 3]); // [1, 2, 3, 4, 5, 6]
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R.contains(R.__, [1, 2, 3])(3); // true
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R.contains<number>(R.__)([1, 2, 3], 3); // true
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R.divide(R.__)(2, 42); // 21
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R.divide(R.__, 2)(42); // 21
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R.gt(R.__, 2)(10); // true
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R.gt(R.__)(2, 10); // true
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R.gte(R.__, 6)(2); // false
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R.gte(R.__)(6, 2); // false
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R.has(R.__, {x: 0, y: 0})('x'); // true;
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R.has(R.__)({x: 0, y: 0}, 'x'); // true;
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R.lt(R.__, 5)(10); // false
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R.lt(R.__)(5, 10); // false
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R.lte(R.__, 2)(1); // true
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R.lte(R.__)(2, 1); // true
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R.mathMod(R.__, 12)(15); // 3
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R.mathMod(R.__)(12, 15); // 3
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R.modulo(R.__, 2)(42); // 0
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R.modulo(R.__)(2, 42); // 0
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R.merge(R.__, {x: 0})({x: 5, y: 2}); // {x: 0, y: 2}
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R.merge(R.__)({x: 0}, {x: 5, y: 2}); // {x: 0, y: 2}
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R.subtract(R.__, 5)(17); // 12
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R.subtract(R.__)(5, 17); // 12
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};
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() => {
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const addFour = (a: number) => (b: number) => (c: number) => (d: number) => a + b + c + d;
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const uncurriedAddFour = R.uncurryN<number>(4, addFour);
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const res: number = uncurriedAddFour(1, 2, 3, 4); // => 10
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};
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() => {
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// coerceArray :: (a|[a]) -> [a]
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const coerceArray = R.unless(R.is(Array), R.of);
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const a: number[] = coerceArray([1, 2, 3]); // => [1, 2, 3]
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const b: number[] = coerceArray(1); // => [1]
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};
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() => {
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const fn: (...args: string[]) => string = R.unapply(JSON.stringify);
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const res: string = R.unapply(JSON.stringify)(1, 2, 3); // => '[1,2,3]'
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};
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() => {
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const a: number = R.until(R.flip(R.gt)(100), R.multiply(2))(1); // => 128
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};
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() => {
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const truncate = R.when(
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R.propSatisfies(R.flip(R.gt)(10), "length"),
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R.pipe<string, string, string[], string>(R.take(10), R.append("…") as (wrong: any) => string[], R.join(""))
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);
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const a: string = truncate("12345"); // => '12345'
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const b: string = truncate("0123456789ABC"); // => '0123456789…'
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};
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/* pipe */
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() => {
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const func: (x: number) => string = R.pipe(double, double, shout);
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const res: string = R.pipe(double, double, shout)(10);
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const capitalize = (str: string) => R.pipe(
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R.split(""),
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R.adjust(0, R.toUpper),
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R.join("")
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)(str);
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const f = R.pipe(Math.pow, R.negate, R.inc);
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const fr: number = f(3, 4); // -(3^4) + 1
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// pipe with first function taking no params
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const f10 = () => 'str';
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const f11 = (str: string) => str;
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const f12: () => string = R.pipe(f10, f11);
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};
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/* pipeK */
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() => {
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const parseJson = (input: string): any[] => {
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try {
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return [JSON.parse(input)];
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} catch (e) {
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return [];
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}
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};
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const get = (prop: string) => (obj: any): any[] => {
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const propVal = obj[prop];
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if (propVal) {
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return [propVal];
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} else {
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return [];
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}
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};
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const getStateCode: (input: string) => string[] = R.pipeK(
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parseJson,
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get('user'),
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get('address'),
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get('state'),
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R.compose((val) => [val], R.toUpper)
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);
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getStateCode('{"user":{"address":{"state":"ny"}}}');
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// => Just('NY')
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getStateCode('[Invalid JSON]');
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// => Nothing()
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};
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/* pipeP */
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() => {
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interface User {
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followers: string[];
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name: string;
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}
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const db = {
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getUserById(userName: string): Promise<User> {
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return Promise.resolve({
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name: 'Jon',
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followers: [
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'Samwell',
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'Edd',
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'Grenn',
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],
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});
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},
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getFollowers(user: User): Promise<string[]> {
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return Promise.resolve(user.followers);
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},
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};
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const followersForUser: (userName: string) => Promise<string[]> = R.pipeP(db.getUserById, db.getFollowers);
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};
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() => {
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interface User {
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followers: string[];
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name: string;
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}
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const db = {
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getUserById(userName: string): Promise<User> {
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return Promise.resolve({
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name: 'Jon',
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followers: [
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'Samwell',
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'Edd',
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'Grenn',
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],
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});
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},
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getFollowers(user: User): Promise<string[]> {
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return Promise.resolve(user.followers);
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},
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};
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const followersForUser: (userName: string) => Promise<string[]> = R.pipeWith(R.andThen, [db.getUserById, db.getFollowers]);
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const followersForUser2: (userName: string) => Promise<string[]> = R.pipeWith(R.andThen)([db.getUserById, db.getFollowers]);
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};
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function square(x: number) {
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return x * x;
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}
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function add(a: number, b: number) {
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return a + b;
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}
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// Adds any number of arguments together
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function addAll() {
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return 0;
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}
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// Basic example
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R.useWith(addAll, [double, square]);
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function i(x: number) {
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return x;
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}
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R.times(i, 5);
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(() => {
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function triple(x: number): number {
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return x * 3;
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}
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function square(x: number): number {
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return x * x;
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}
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const squareThenDoubleThenTriple = R.pipe(square, double, triple);
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squareThenDoubleThenTriple(5); // => 150
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})();
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(() => {
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const numbers = [1, 2, 3];
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R.reduce((a, b) => a + b, 10, numbers); // => 16;
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})();
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(() => {
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const pairs = [["a", 1], ["b", 2], ["c", 3]];
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function flattenPairs(pair: [string, number], acc: Array<string|number>): Array<string|number> {
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return acc.concat(pair);
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}
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R.reduceRight(flattenPairs, [], pairs); // => [ 'c', 3, 'b', 2, 'a', 1 ]
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})();
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(() => {
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function isOdd(n: number) {
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return n % 2 === 1;
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}
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R.reject(isOdd, [1, 2, 3, 4]); // => [2, 4]
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R.reject(isOdd, { a: 0, b: 1 }); // => { a: 0 }
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});
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(() => {
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function isNotFour(x: number) {
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return !(x === 4);
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}
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R.takeWhile(isNotFour, [1, 2, 3, 4]); // => [1, 2, 3]
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R.take(2, [1, 2, 3, 4]); // => [1, 2]
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});
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(() => {
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function f(n: number): false | [number, number] {
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return n > 50 ? false : [-n, n + 10];
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}
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const a = R.unfold(f, 10); // => [-10, -20, -30, -40, -50]
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const b = R.unfold(f); // => [-10, -20, -30, -40, -50]
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const c = b(10);
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});
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/*********************
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* List category
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*/
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() => {
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function isEven(n: number) {
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return n % 2 === 0;
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}
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const rejectEven = R.reject(isEven);
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const objB: Dictionary<number> = rejectEven({ a: 0, b: 1 }); // => { b: 1 }
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const listB: number[] = rejectEven([0, 1]); // => [1]
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};
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() => {
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function isEven(n: number) {
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return n % 2 === 0;
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}
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const a: Dictionary<number> = R.pipe(
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R.filter<number, 'object'>(isEven),
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)({ a: 0, b: 1 }); // => { a: 0 }
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const b: number[] = R.pipe(
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R.filter<number, 'array'>(isEven),
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)([0, 1]); // => [0]
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const c: Dictionary<number> = R.pipe(
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R.reject<number, 'object'>(isEven),
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)({ a: 0, b: 1 }); // => { b: 1 }
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const d: number[] = R.pipe(
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R.reject<number, 'array'>(isEven),
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)([0, 1]); // => [1]
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};
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() => {
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const xs = {a: "1", b: "0"};
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R.propEq("a", "1", xs); // => true
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R.propEq("a", "4", xs); // => false
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};
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() => {
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const xs = {a: 1, b: 0};
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R.propEq("a", 1, xs); // => true
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R.propEq("a", 4, xs); // => false
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};
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interface Obj {
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a: number;
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b: number;
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}
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() => {
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const xs: Obj = {a: 1, b: 0};
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R.propEq("a", 1, xs); // => true
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R.propEq("a", 4, xs); // => false
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};
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() => {
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interface MyObject {
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id: string;
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quantity: number;
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}
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const reduceWithCombinedQuantities = (items: MyObject[]) =>
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items.reduce<MyObject>(
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(acc, item) => ({...item, quantity: acc.quantity + item.quantity}),
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{id: '', quantity: 0},
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);
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const combineMyObjects = R.pipe(
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R.groupBy<MyObject>(s => s.id),
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R.values,
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R.map(reduceWithCombinedQuantities),
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);
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const combined = combineMyObjects([
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{id: 'foo', quantity: 4},
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{id: 'bar', quantity: 3},
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{id: 'foo', quantity: 2},
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]);
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return {
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id: combined[0].id,
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quantity: combined[0].quantity
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};
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};
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(() => {
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interface Book {
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id: string;
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title: string;
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}
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const list: Book[] = [{id: "xyz", title: "A"}, {id: "abc", title: "B"}];
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const titlesIndexedByTitles: { [k: string]: string } = R.pipe(
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R.map((x: Book) => x.title),
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R.indexBy(x => x),
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)(list);
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});
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() => {
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const headLens = R.lensIndex(0);
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R.view(headLens, ["a", "b", "c"]); // => 'a'
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R.set(headLens, "x", ["a", "b", "c"]); // => ['x', 'b', 'c']
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};
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() => {
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const a = R.pluck("a")([{a: 1}, {a: 2}]); // => [1, 2]
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const b = R.pluck(0)([[1, 2], [3, 4]]); // => [1, 3]
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};
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() => {
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R.prepend("fee", ["fi", "fo", "fum"]); // => ['fee', 'fi', 'fo', 'fum']
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R.prepend("fee")(["fi", "fo", "fum"]); // => ['fee', 'fi', 'fo', 'fum']
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};
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() => {
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R.range(1, 5); // => [1, 2, 3, 4]
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R.range(50)(53); // => [50, 51, 52]
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};
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() => {
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const numbers = [1, 2, 3];
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R.reduce((a, b) => a + b, 10, numbers); // => 16
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R.reduce(add)(10, numbers); // => 16
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R.reduce<number, number>((a, b) => a + b, 10)(numbers); // => 16
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};
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interface Student {
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name: string;
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score: number;
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}
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() => {
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const reduceToNamesBy = R.reduceBy((acc: string[], student: Student) => acc.concat(student.name), []);
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const namesByGrade = reduceToNamesBy((student) => {
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const score = student.score;
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return score < 65 ? "F" :
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score < 70 ? "D" :
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score < 80 ? "C" :
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score < 90 ? "B" : "A";
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});
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const students = [{name: "Lucy", score: 92},
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{name: "Drew", score: 85},
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{name: "Bart", score: 62}];
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const names = namesByGrade(students);
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// {
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// 'A': ['Lucy'],
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// 'B': ['Drew']
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// 'F': ['Bart']
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// }
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};
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interface KeyValuePair<K, V> extends Array<K | V> {
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0: K;
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1: V;
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}
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type Pair = KeyValuePair<string, number>;
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() => {
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const pairs: Pair[] = [["a", 1], ["b", 2], ["c", 3]];
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function flattenPairs(pair: Pair, acc: Array<string|number>): Array<string|number> {
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return acc.concat(pair);
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}
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R.reduceRight(flattenPairs, [], pairs); // => [ 'c', 3, 'b', 2, 'a', 1 ]
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R.reduceRight(flattenPairs, [])(pairs); // => [ 'c', 3, 'b', 2, 'a', 1 ]
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R.reduceRight(flattenPairs)([], pairs); // => [ 'c', 3, 'b', 2, 'a', 1 ]
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};
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() => {
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const isOdd = (acc: number, x: number) => x % 2 === 1;
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const xs: number[] = [1, 3, 5, 60, 777, 800];
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R.reduceWhile(isOdd, R.add, 0, xs); // => 9
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R.reduceWhile(isOdd)(R.add, 0, xs); // => 9
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R.reduceWhile(isOdd)(R.add, 0)(xs); // => 9
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R.reduceWhile(isOdd)(R.add)(0, xs); // => 9
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R.reduceWhile(isOdd)(R.add)(0)(xs); // => 9
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R.reduceWhile(isOdd, R.add)(0, xs); // => 9
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R.reduceWhile(isOdd, R.add)(0)(xs); // => 9
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R.reduceWhile(isOdd, R.add, 0)(xs); // => 9
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const ys: number[] = [];
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R.reduceWhile(isOdd, R.add, 111, ys); // => 111
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R.reduceWhile(isOdd)(R.add, 111, ys); // => 111
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R.reduceWhile(isOdd)(R.add, 111)(ys); // => 111
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R.reduceWhile(isOdd)(R.add)(111, ys); // => 111
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R.reduceWhile(isOdd)(R.add)(111)(ys); // => 111
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R.reduceWhile(isOdd, R.add)(111, ys); // => 111
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R.reduceWhile(isOdd, R.add)(111)(ys); // => 111
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R.reduceWhile(isOdd, R.add, 111)(ys); // => 111
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};
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() => {
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function isOdd(n: number) {
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return n % 2 === 1;
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}
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R.reject(isOdd, [1, 2, 3, 4]); // => [2, 4]
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R.reject(isOdd)([1, 2, 3, 4]); // => [2, 4]
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};
|
|
|
|
() => {
|
|
R.remove(2, 3, [1, 2, 3, 4, 5, 6, 7, 8]); // => [1,2,6,7,8]
|
|
R.remove(2, 3)([1, 2, 3, 4, 5, 6, 7, 8]); // => [1,2,6,7,8]
|
|
R.remove(2)(3, [1, 2, 3, 4, 5, 6, 7, 8]); // => [1,2,6,7,8]
|
|
};
|
|
|
|
() => {
|
|
R.repeat("hi", 5); // => ['hi', 'hi', 'hi', 'hi', 'hi']
|
|
const obj = {};
|
|
const repeatedObjs = R.repeat(obj, 5); // => [{}, {}, {}, {}, {}]
|
|
repeatedObjs[0] === repeatedObjs[1]; // => true
|
|
};
|
|
|
|
() => {
|
|
R.reverse([1, 2, 3]); // => [3, 2, 1]
|
|
R.reverse([1, 2]); // => [2, 1]
|
|
R.reverse([1]); // => [1]
|
|
R.reverse([]); // => []
|
|
};
|
|
|
|
() => {
|
|
R.reverse('abc'); // => 'cba'
|
|
R.reverse('ab'); // => 'ba'
|
|
R.reverse('a'); // => 'a'
|
|
R.reverse(''); // => ''
|
|
};
|
|
|
|
() => {
|
|
const numbers = [1, 2, 3, 4];
|
|
R.scan(R.multiply, 1, numbers); // => [1, 1, 2, 6, 24]
|
|
R.scan(R.multiply, 1)(numbers); // => [1, 1, 2, 6, 24]
|
|
R.scan(R.multiply)(1, numbers); // => [1, 1, 2, 6, 24]
|
|
};
|
|
|
|
() => {
|
|
const xs = R.range(0, 10);
|
|
R.slice(2, 5, xs); // => [2, 3, 4]
|
|
R.slice(2, 5)(xs); // => [2, 3, 4]
|
|
R.slice(2)(5, xs); // => [2, 3, 4]
|
|
|
|
const str = "Hello World";
|
|
R.slice(2, 5, str); // => 'llo'
|
|
R.slice(2, 5)(str); // => 'llo'
|
|
R.slice(2)(5, str); // => 'llo'
|
|
};
|
|
|
|
() => {
|
|
function diff(a: number, b: number) {
|
|
return a - b;
|
|
}
|
|
|
|
R.sort(diff, [4, 2, 7, 5]); // => [2, 4, 5, 7]
|
|
R.sort(diff)([4, 2, 7, 5]); // => [2, 4, 5, 7]
|
|
};
|
|
|
|
() => {
|
|
R.tail(["fi", "fo", "fum"]); // => ['fo', 'fum']
|
|
R.tail([1, 2, 3]); // => [2, 3]
|
|
R.tail("abc"); // => 'bc'
|
|
R.tail(""); // => ''
|
|
};
|
|
|
|
() => {
|
|
R.take(3, [1, 2, 3, 4, 5]); // => [1,2,3]
|
|
|
|
const members = ["Paul Desmond", "Bob Bates", "Joe Dodge", "Ron Crotty", "Lloyd Davis", "Joe Morello", "Norman Bates",
|
|
"Eugene Wright", "Gerry Mulligan", "Jack Six", "Alan Dawson", "Darius Brubeck", "Chris Brubeck",
|
|
"Dan Brubeck", "Bobby Militello", "Michael Moore", "Randy Jones"];
|
|
const takeFive = R.take(5);
|
|
|
|
// $ExpectType string[]
|
|
takeFive(members); // => ["Paul Desmond","Bob Bates","Joe Dodge","Ron Crotty","Lloyd Davis"]
|
|
};
|
|
|
|
() => {
|
|
R.take(3, "Example"); // => "Exa"
|
|
|
|
const takeThree = R.take(3);
|
|
takeThree("Example"); // => "Exa"
|
|
};
|
|
|
|
() => {
|
|
const a: string[] = R.takeLast(1, ["foo", "bar", "baz"]); // => ['baz']
|
|
const b: string[] = R.takeLast(2)(["foo", "bar", "baz"]); // => ['bar', 'baz']
|
|
const c: string = R.takeLast(3, "ramda"); // => 'mda'
|
|
const d: string = R.takeLast(3)("ramda"); // => 'mda'
|
|
};
|
|
|
|
() => {
|
|
const isNotOne = (x: number) => x !== 1;
|
|
const a: number[] = R.takeLastWhile(isNotOne, [1, 2, 3, 4]); // => [2, 3, 4]
|
|
const b: number[] = R.takeLastWhile(isNotOne)([1, 2, 3, 4]); // => [2, 3, 4]
|
|
};
|
|
|
|
() => {
|
|
function isNotFour(x: number) {
|
|
return !(x === 4);
|
|
}
|
|
|
|
R.takeWhile(isNotFour, [1, 2, 3, 4]); // => [1, 2, 3]
|
|
R.takeWhile(isNotFour)([1, 2, 3, 4]); // => [1, 2, 3]
|
|
};
|
|
|
|
() => {
|
|
const sayX = (x: number) => console.log("x is " + x);
|
|
const a: number = R.tap(sayX, 100); // => 100
|
|
};
|
|
|
|
() => {
|
|
const a: boolean = R.test(/^x/, "xyz"); // => true
|
|
const b: boolean = R.test(/^y/)("xyz"); // => false
|
|
};
|
|
|
|
() => {
|
|
interface Person { id: number; firstName: string; lastName: string; }
|
|
const makeQuery = (email: string) => ({ query: { email }});
|
|
const fetchMember = (query: any) => Promise.resolve({ id: 1, firstName: 'Jon', lastName: 'Snow' });
|
|
const getTitleAsync = (person: Person) => person.firstName === 'Jon' && person.lastName === 'Snow' ? Promise.resolve('King in the North') : Promise.reject('Unknown');
|
|
|
|
const getMemberName: (email: string) => Promise<{ firstName: string, lastName: string }> = R.pipe(
|
|
makeQuery,
|
|
fetchMember,
|
|
R.andThen(R.pick(['firstName', 'lastName'])),
|
|
);
|
|
|
|
const getMemberTitle: (email: string) => Promise<string> = R.pipe(
|
|
makeQuery,
|
|
fetchMember,
|
|
R.andThen(getTitleAsync),
|
|
);
|
|
};
|
|
|
|
() => {
|
|
const x: unknown = R.thunkify(R.identity)(42)();
|
|
const y: number = R.thunkify((a: number, b: number) => a + b)(25, 17)();
|
|
const z: number = R.thunkify((a: number, b: number) => a + b)(25)(17)();
|
|
};
|
|
|
|
() => {
|
|
const a1 = R.times(R.identity, 5); // => [0, 1, 2, 3, 4]
|
|
const a2 = R.times(R.identity)(5); // => [0, 1, 2, 3, 4]
|
|
};
|
|
|
|
() => {
|
|
class Point {
|
|
constructor(public x: number, public y: number) {
|
|
this.x = x;
|
|
this.y = y;
|
|
}
|
|
|
|
toStringn() {
|
|
return `new Point(${this.x}, ${this.y})`;
|
|
}
|
|
}
|
|
R.toString(new Point(1, 2)); // => 'new Point(1, 2)'
|
|
|
|
R.toString(42); // => '42'
|
|
R.toString("abc"); // => '"abc"'
|
|
R.toString([1, 2, 3]); // => '[1, 2, 3]'
|
|
R.toString({foo: 1, bar: 2, baz: 3}); // => '{"bar": 2, "baz": 3, "foo": 1}'
|
|
R.toString(new Date("2001-02-03T04:05:06Z")); // => 'new Date("2001-02-03T04:05:06.000Z")'
|
|
};
|
|
|
|
() => {
|
|
const numbers = [1, 2, 3, 4];
|
|
const transducer = R.compose(R.map(R.add(1)), R.take(2));
|
|
const fn = R.flip<number, number[], number[]>(R.append);
|
|
R.transduce(transducer, fn, [], numbers); // => [2, 3]
|
|
R.transduce(transducer, fn, [])(numbers); // => [2, 3]
|
|
R.transduce(transducer, fn)([], numbers); // => [2, 3]
|
|
R.transduce<number, number>(transducer)(fn, [], numbers); // => [2, 3]
|
|
};
|
|
|
|
() => {
|
|
const a: Array<Array<number | string>> = R.transpose<number | string>([[1, "a"], [2, "b"], [3, "c"]]); // => [[1, 2, 3], ['a', 'b', 'c']]
|
|
const b: Array<Array<number | string>> = R.transpose<number | string>([[1, 2, 3], ["a", "b", "c"]]); // => [[1, 'a'], [2, 'b'], [3, 'c']]
|
|
const c: number[][] = R.transpose([[10, 11], [20], [], [30, 31, 32]]); // => [[10, 20, 30], [11, 31], [32]]
|
|
};
|
|
|
|
() => {
|
|
const of = Array.of;
|
|
const fn = (x: number) => Array.of(x + 1);
|
|
const list = [1, 2, 3];
|
|
R.traverse(of, fn, list);
|
|
R.traverse(of, fn)(list);
|
|
R.traverse<number, number>(of)(fn, list);
|
|
};
|
|
|
|
() => {
|
|
const x = R.prop("x");
|
|
const a: boolean = R.tryCatch<boolean>(R.prop("x"), R.F)({x: true}); // => true
|
|
const a1: boolean = R.tryCatch(R.prop<"x", true>("x"), R.F)({x: true}); // => true
|
|
const b: boolean = R.tryCatch<boolean>(R.prop("x"), R.F)(null); // => false
|
|
const c: boolean = R.tryCatch<boolean>(R.and, R.F)(true, true); // => true
|
|
};
|
|
|
|
() => {
|
|
R.uniq([1, 1, 2, 1]); // => [1, 2]
|
|
R.uniq([{}, {}]); // => [{}, {}]
|
|
R.uniq([1, "1"]); // => [1, '1']
|
|
};
|
|
|
|
() => {
|
|
function strEq(a: any, b: any) {
|
|
return String(a) === String(b);
|
|
}
|
|
|
|
R.uniqWith(strEq, [1, "1", 2, 1]); // => [1, 2]
|
|
R.uniqWith(strEq)([1, "1", 2, 1]); // => [1, 2]
|
|
R.uniqWith(strEq)([{}, {}]); // => [{}]
|
|
R.uniqWith(strEq)([1, "1", 1]); // => [1]
|
|
R.uniqWith(strEq)(["1", 1, 1]); // => ['1']
|
|
};
|
|
|
|
() => {
|
|
R.xprod([1, 2], ["a", "b"]); // => [[1, 'a'], [1, 'b'], [2, 'a'], [2, 'b']]
|
|
R.xprod([1, 2])(["a", "b"]); // => [[1, 'a'], [1, 'b'], [2, 'a'], [2, 'b']]
|
|
};
|
|
|
|
() => {
|
|
R.zip([1, 2, 3], ["a", "b", "c"]); // => [[1, 'a'], [2, 'b'], [3, 'c']]
|
|
R.zip([1, 2, 3])(["a", "b", "c"]); // => [[1, 'a'], [2, 'b'], [3, 'c']]
|
|
|
|
type TNames = string[];
|
|
const fullNames: TNames[] = R.zip<string, string>(["John", "Juliet", "Melanie"], ["Titor", "Burke", "Cross"]);
|
|
const fullNames2: TNames[] = R.zip(["John", "Juliet", "Melanie"])(["Titor", "Burke", "Cross"]);
|
|
|
|
type TNameAge = [string, number];
|
|
const namesAndAges: TNameAge[] = R.zip<string, number>(["John", "Juliet", "Melanie"], [21, 22, 23]);
|
|
const namesAndAges2: TNameAge[] = R.zip(["John", "Juliet", "Melanie"])([21, 22, 23]);
|
|
};
|
|
|
|
() => {
|
|
R.zipObj(["a", "b", "c"], [1, 2, 3]); // => {a: 1, b: 2, c: 3}
|
|
R.zipObj(["a", "b", "c"])([1, 2, 3]); // => {a: 1, b: 2, c: 3}
|
|
R.zipObj([1, 2, 3], ['a', 'b', 'c']); // => {1: 'a', 2: 'b', 3: 'c'}
|
|
R.zipObj([1, 2, 3])(['a', 'b', 'c']); // => {1: 'a', 2: 'b', 3: 'c'}
|
|
};
|
|
|
|
() => {
|
|
function f(x: number, y: string) {
|
|
// ...
|
|
}
|
|
|
|
R.zipWith(f, [1, 2, 3], ["a", "b", "c"]); // => [f(1, 'a'), f(2, 'b'), f(3, 'c')]
|
|
R.zipWith(f)([1, 2, 3], ["a", "b", "c"]); // => [f(1, 'a'), f(2, 'b'), f(3, 'c')]
|
|
R.zipWith(f, [1, 2, 3])(["a", "b", "c"]); // => [f(1, 'a'), f(2, 'b'), f(3, 'c')]
|
|
};
|
|
|
|
/*****************************************************************
|
|
* Object category
|
|
*/
|
|
|
|
() => {
|
|
interface Person { firstName: string; lastName: string; }
|
|
const failedFetch = (id: string): Promise<Person> => Promise.reject('bad ID');
|
|
const useDefault = (): Person => ({ firstName: 'Bob', lastName: 'Loblaw' });
|
|
const loadAlternative = (): Promise<Person> => Promise.resolve({ firstName: 'Saul', lastName: 'Goodman' });
|
|
|
|
const recoverFromFailure: (id: string) => Promise<{ firstName: string; lastName: string; }> = R.pipe(
|
|
failedFetch,
|
|
R.otherwise(useDefault),
|
|
R.andThen(R.pick(['firstName', 'lastName'])),
|
|
);
|
|
|
|
const recoverFromFailureByAlternative: (id: string) => Promise<Person> = R.pipe(
|
|
failedFetch,
|
|
R.otherwise(useDefault),
|
|
R.andThen(loadAlternative),
|
|
);
|
|
};
|
|
|
|
() => {
|
|
const xLens = R.lens(R.prop("x"), R.assoc("x"));
|
|
R.view(xLens, {x: 1, y: 2}); // => 1
|
|
R.view(xLens)({x: 1, y: 2}); // => 1
|
|
R.set(xLens, 4, {x: 1, y: 2}); // => {x: 4, y: 2}
|
|
R.set(xLens)(4, {x: 1, y: 2}); // => {x: 4, y: 2}
|
|
R.set(xLens, 4)({x: 1, y: 2}); // => {x: 4, y: 2}
|
|
};
|
|
|
|
() => {
|
|
const headLens = R.lensIndex(0);
|
|
R.view(headLens, ["a", "b", "c"]); // => 'a'
|
|
R.set(headLens, "x", ["a", "b", "c"]); // => ['x', 'b', 'c']
|
|
};
|
|
|
|
() => {
|
|
const xLens = R.lensProp("x");
|
|
R.view(xLens, {x: 1, y: 2}); // => 1
|
|
R.set(xLens, 4, {x: 1, y: 2}); // => {x: 4, y: 2}
|
|
};
|
|
|
|
() => {
|
|
const xyLens = R.lensPath(["x", 0, "y"]);
|
|
const testObj = {x: [{y: 2, z: 3}, {y: 4, z: 5}]};
|
|
|
|
R.view(xyLens, testObj); // => 2
|
|
R.set(xyLens, 4, testObj); // => {x: [{y: 4, z: 3}, {y: 4, z: 5}]}
|
|
};
|
|
|
|
() => {
|
|
const abby = {name: "Abby", age: 7, hair: "blond", grade: 2};
|
|
const fred = {name: "Fred", age: 12, hair: "brown", grade: 7};
|
|
const kids = [abby, fred];
|
|
R.project(["name", "grade"], kids); // => [{name: 'Abby', grade: 2}, {name: 'Fred', grade: 7}]
|
|
R.project(["name", "grade"])(kids); // => [{name: 'Abby', grade: 2}, {name: 'Fred', grade: 7}]
|
|
};
|
|
|
|
() => {
|
|
const x: number = R.prop("x", {x: 100}); // => 100
|
|
const obj = {
|
|
str: 'string',
|
|
num: 5,
|
|
};
|
|
|
|
const strVal: string = R.prop('str', obj); // => 'string'
|
|
const numVal: number = R.prop('num', obj); // => 5
|
|
|
|
const strValPl: string = R.prop(R.__, obj)('str'); // => 'string'
|
|
|
|
const strValCur: string = R.prop('str')(obj); // => 'string'
|
|
const numValCur: number = R.prop('num')(obj); // => 5
|
|
};
|
|
|
|
() => {
|
|
const alice = {
|
|
name: "ALICE",
|
|
age : 101
|
|
};
|
|
const favorite = R.prop("favoriteLibrary");
|
|
const favoriteWithDefault = R.propOr("Ramda", "favoriteLibrary");
|
|
|
|
const s2 = favoriteWithDefault(alice); // => 'Ramda'
|
|
R.propOr('Ramda', R.__, alice)('name'); // => 'ALICE'
|
|
R.propOr(R.__, 'foo', alice)('default'); // => 'default'
|
|
};
|
|
|
|
() => {
|
|
const a: boolean = R.propSatisfies((x: number) => x > 0, "x", {x: 1, y: 2}); // => true
|
|
const b: boolean = R.propSatisfies((x: number) => x > 0, "x")({x: 1, y: 2}); // => true
|
|
const c: boolean = R.propSatisfies((x: number) => x > 0)("x")({x: 1, y: 2}); // => true
|
|
};
|
|
|
|
() => {
|
|
R.props(["x", "y"], {x: 1, y: 2}); // => [1, 2]
|
|
};
|
|
|
|
() => {
|
|
const a = R.toPairs<number>({a: 1, b: 2, c: 3}); // => [['a', 1], ['b', 2], ['c', 3]]
|
|
const b = R.toPairs({1: 'a'}); // => [['1', 'something']]
|
|
};
|
|
|
|
() => {
|
|
const f = new F();
|
|
const a1 = R.toPairsIn(f); // => [['x','X'], ['y','Y']]
|
|
const a2 = R.toPairsIn<string>(f); // => [['x','X'], ['y','Y']]
|
|
};
|
|
|
|
() => {
|
|
interface A {
|
|
a: string;
|
|
b: string;
|
|
}
|
|
const a1: A = { a: 'something', b: 'else' };
|
|
const v1 = R.values(a1);
|
|
|
|
const a = R.values({a: 1, b: 2, c: 3}); // => [1, 2, 3] (number[])
|
|
const addition = a[0] + a[1];
|
|
|
|
const b = R.values({a: 1, b: 'something'}); // b = (string|number)[]
|
|
const c = R.values({1: 3});
|
|
// const d = R.values('something');
|
|
};
|
|
|
|
() => {
|
|
const f = new F();
|
|
const a = R.valuesIn(f); // => ['X', 'Y']
|
|
};
|
|
|
|
() => {
|
|
const spec = {x: 2};
|
|
const x1: boolean = R.where(spec, {w: 10, x: 2, y: 300}); // => true
|
|
const x2: boolean = R.where(spec, {x: 1, y: "moo", z: true}); // => false
|
|
const x3: boolean = R.where(spec)({w: 10, x: 2, y: 300}); // => true
|
|
const x4: boolean = R.where(spec)({x: 1, y: "moo", z: true}); // => false
|
|
|
|
// There's no way to represent the below functionality in typescript
|
|
// per http://stackoverflow.com/a/29803848/632495
|
|
// will need a work around.
|
|
|
|
const spec2 = {
|
|
x: (val: number, obj: any) => val + obj.y > 10
|
|
};
|
|
R.where(spec2, {x: 2, y: 7}); // => false
|
|
R.where(spec2, {x: 3, y: 8}); // => true
|
|
};
|
|
|
|
() => {
|
|
// pred :: Object -> Boolean
|
|
const pred = R.whereEq({a: 1, b: 2});
|
|
pred({a: 1}); // => false
|
|
pred({a: 1, b: 2}); // => true
|
|
pred({a: 1, b: 2, c: 3}); // => true
|
|
pred({a: 1, b: 1}); // => false
|
|
R.whereEq({a: "one"}, {a: "one"}); // => true
|
|
};
|
|
|
|
() => {
|
|
const a: number[] = R.without([1, 2], [1, 2, 1, 3, 4]); // => [3, 4]
|
|
};
|
|
|
|
() => {
|
|
const people = [
|
|
{name: 'Agy', age: 33}, {name: 'Bib', age: 15}, {name: 'Cari', age: 16}
|
|
];
|
|
|
|
R.sortWith([R.ascend(R.prop('age')), R.descend(R.prop('name'))], people);
|
|
};
|
|
|
|
/*****************************************************************
|
|
* Relation category
|
|
*/
|
|
() => {
|
|
const sortByAgeDescending = R.sortBy(R.compose<{}, number, number>(R.negate, R.prop("age")));
|
|
const alice = {
|
|
name: "ALICE",
|
|
age : 101
|
|
};
|
|
const bob = {
|
|
name: "Bob",
|
|
age : -10
|
|
};
|
|
const clara = {
|
|
name: "clara",
|
|
age : 314.159
|
|
};
|
|
const people = [clara, bob, alice];
|
|
sortByAgeDescending(people); // => [alice, bob, clara]
|
|
};
|
|
|
|
() => {
|
|
const sortByNameCaseInsensitive = R.sortBy(R.compose<Record<'name', string>, string, string>(R.toLower, R.prop("name")));
|
|
const alice = {
|
|
name: "ALICE",
|
|
age : 101
|
|
};
|
|
const bob = {
|
|
name: "Bob",
|
|
age : -10
|
|
};
|
|
const clara = {
|
|
name: "clara",
|
|
age : 314.159
|
|
};
|
|
const people = [clara, bob, alice];
|
|
sortByNameCaseInsensitive(people); // => [alice, bob, clara]
|
|
};
|
|
|
|
() => {
|
|
const a: number[][] = R.splitAt(1, [1, 2, 3]); // => [[1], [2, 3]]
|
|
const b: number[][] = R.splitAt(1)([1, 2, 3]); // => [[1], [2, 3]]
|
|
const c: string[] = R.splitAt(5, "hello world"); // => ['hello', ' world']
|
|
const d: string[] = R.splitAt(-1, "foobar"); // => ['fooba', 'r']
|
|
const e: string[] = R.splitAt(-1)("foobar"); // => ['fooba', 'r']
|
|
};
|
|
|
|
() => {
|
|
const a: number[][] = R.splitEvery(3, [1, 2, 3, 4, 5, 6, 7]); // => [[1, 2, 3], [4, 5, 6], [7]]
|
|
const b: number[][] = R.splitEvery(3)([1, 2, 3, 4, 5, 6, 7]); // => [[1, 2, 3], [4, 5, 6], [7]]
|
|
const c: string[] = R.splitEvery(3, 'foobarbaz'); // => ['foo', 'bar', 'baz']
|
|
const d: string[] = R.splitEvery(3)('foobarbaz'); // => ['foo', 'bar', 'baz']
|
|
};
|
|
|
|
() => {
|
|
const a: number[][] = R.splitWhen(R.equals(2), [1, 2, 3, 1, 2, 3]); // => [[1], [2, 3, 1, 2, 3]]
|
|
const b: number[][] = R.splitWhen(R.equals(2))([1, 2, 3, 1, 2, 3]); // => [[1], [2, 3, 1, 2, 3]]
|
|
};
|
|
|
|
() => {
|
|
R.startsWith("a", "abc"); // => true
|
|
R.startsWith("a")("abc"); // => true
|
|
R.startsWith(1, [1, 2, 3]); // => true
|
|
R.startsWith(1)([1, 2, 3]); // => true
|
|
R.startsWith([1], [1, 2, 3]); // => true
|
|
R.startsWith([1])([1, 2, 3]); // => true
|
|
};
|
|
|
|
() => {
|
|
R.product([2, 4, 6, 8, 100, 1]); // => 38400
|
|
};
|
|
|
|
() => {
|
|
R.subtract(10, 8); // => 2
|
|
|
|
const complementaryAngle = R.subtract(90);
|
|
complementaryAngle(30); // => 60
|
|
complementaryAngle(72); // => 18
|
|
};
|
|
|
|
() => {
|
|
R.sum([2, 4, 6, 8, 100, 1]); // => 121
|
|
};
|
|
|
|
() => {
|
|
const a: number[] = R.symmetricDifference([1, 2, 3, 4], [7, 6, 5, 4, 3]); // => [1,2,7,6,5]
|
|
const b: number[] = R.symmetricDifference([7, 6, 5, 4, 3])([1, 2, 3, 4]); // => [7,6,5,1,2]
|
|
};
|
|
|
|
() => {
|
|
const eqA = R.eqBy(R.prop("a"));
|
|
const l1 = [{a: 1}, {a: 2}, {a: 3}, {a: 4}];
|
|
const l2 = [{a: 3}, {a: 4}, {a: 5}, {a: 6}];
|
|
R.symmetricDifferenceWith(eqA, l1, l2); // => [{a: 1}, {a: 2}, {a: 5}, {a: 6}]
|
|
R.symmetricDifferenceWith(eqA)(l1, l2); // => [{a: 1}, {a: 2}, {a: 5}, {a: 6}]
|
|
// const c: (a: any[]) => any[] = R.symmetricDifferenceWith(eqA)(l1); // => [{a: 1}, {a: 2}, {a: 5}, {a: 6}]
|
|
};
|
|
|
|
() => {
|
|
const eqL = R.eqBy<string, number>(s => s.length);
|
|
const l1 = ['bb', 'ccc', 'dddd'];
|
|
const l2 = ['aaa', 'bb', 'c'];
|
|
R.symmetricDifferenceWith(eqL, l1, l2); // => ['dddd', 'c']
|
|
R.symmetricDifferenceWith(eqL)(l1, l2); // => ['dddd', 'c']
|
|
};
|
|
|
|
/*****************************************************************
|
|
* String category
|
|
*/
|
|
() => {
|
|
R.replace("foo", "bar", "foo foo foo"); // => 'bar foo foo'
|
|
R.replace("foo", "bar")("foo foo foo"); // => 'bar foo foo'
|
|
R.replace("foo")("bar")("foo foo foo"); // => 'bar foo foo'
|
|
R.replace(/foo/, "bar", "foo foo foo"); // => 'bar foo foo'
|
|
|
|
// Use the "g" (global) flag to replace all occurrences:
|
|
R.replace(/foo/g, "bar", "foo foo foo"); // => 'bar bar bar'
|
|
R.replace(/foo/g, "bar")("foo foo foo"); // => 'bar bar bar'
|
|
R.replace(/foo/g)("bar")("foo foo foo"); // => 'bar bar bar'
|
|
|
|
// Using a function as the replacement value
|
|
R.replace(/([cfk])oo/g, (match, p1, offset) => `${p1}-${offset}`, "coo foo koo"); // => 'c0oo f4oo k8oo'
|
|
R.replace(/([cfk])oo/g, (match, p1, offset) => `${p1}-${offset}`)("coo foo koo"); // => 'c0oo f4oo k8oo'
|
|
R.replace(/([cfk])oo/g)((match, p1, offset) => `${p1}-${offset}`) ("coo foo koo"); // => 'c0oo f4oo k8oo'
|
|
};
|
|
|
|
() => {
|
|
interface A {
|
|
a: number;
|
|
}
|
|
|
|
interface B {
|
|
b: number;
|
|
}
|
|
|
|
const As = [{ a: 1 }, { a: 2 }];
|
|
const AsToBs: (a: A[]) => B[] = R.map((a: A): B => ({
|
|
b: a.a,
|
|
}));
|
|
|
|
function test(): B[] {
|
|
return R.into<A, B>([], AsToBs, As);
|
|
}
|
|
test(); // => [{ b: 1 }, { b: 2 }]
|
|
};
|