Add just-map-values and just-safe-set types (#42739)

* Add some just functions

* Fix some tests

* Fixes for code review

* Fix tests

types/just-map-values/index.d.ts

@@ -0,0 +1,8 @@
+// Type definitions for just-map-values 1.1
+// Project: https://github.com/angus-c/just#readme
+// Definitions by: Roman Lerchster <https://github.com/wa4-fearless-otter>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare function map<T extends {}>(item: T, callback: (value: any, key: string, object: T) => any): {};
+
+export = map;

types/just-map-values/just-map-values-tests.ts

@@ -0,0 +1,11 @@
+import map = require("just-map-values");
+
+const obj = {foo: {bar: []}};
+
+map(obj, (value) => value); // $ExpectType {}
+map(obj, (value, key, object) => ''); // $ExpectType {}
+
+// Incorrect argument
+map(); // $ExpectError
+map(obj); // $ExpectError
+map(obj, ''); // $ExpectError

types/just-map-values/tsconfig.json

@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "just-map-values-tests.ts"
+    ]
+}

types/just-map-values/tslint.json

@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }

types/just-safe-set/index.d.ts

@@ -0,0 +1,8 @@
+// Type definitions for just-safe-set 2.1
+// Project: https://github.com/angus-c/just#readme
+// Definitions by: Roman Lerchster <https://github.com/wa4-fearless-otter>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare function set(item: any[] | {}, target: string | symbol | Array<string | symbol>, value: any): boolean;
+
+export = set;

types/just-safe-set/just-safe-set-tests.ts

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+import set = require("just-safe-set");
+
+const arr = ['one', 'two'];
+const obj = {foo: {bar: arr}};
+
+// Pass single `object`.
+set(arr, '0', {}); // $ExpectType boolean
+set(arr, ['0'], ''); // $ExpectType boolean
+set(obj, 'foo.bar', 0); // $ExpectType boolean
+set(obj, 'foo.bar.0', 1); // $ExpectType boolean
+
+// Incorrect argument
+set(); // $ExpectError
+set(obj); // $ExpectError
+set([]); // $ExpectError
+set({}); // $ExpectError
+set(obj, 3); // $ExpectError
+set(obj, [3]); // $ExpectError
+set(false); // $ExpectError
+set(null); // $ExpectError
+set(undefined); // $ExpectError
+set(obj, 'foo.bar'); // $ExpectError

types/just-safe-set/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "just-safe-set-tests.ts"
+    ]
+}

types/just-safe-set/tslint.json

@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }