Merge pull request #5793 from chrootsu/lodash-callback

lodash: added _.callback() method (alias iteratee)

lodash/lodash-tests.ts

@@ -1960,9 +1960,32 @@ result = <string[]>_.words('fred, barney, & pebbles', /[^, ]+/g);
 result = <string[]>_('fred, barney, & pebbles').words();
 result = <string[]>_('fred, barney, & pebbles').words(/[^, ]+/g);
 
-/**********
-* Utilities *
-***********/
+/***********
+ * Utility *
+ ***********/
+
+// _.callback
+{
+    let result: (...args: any[]) => TResult;
+    result = _.callback<TResult>(Function);
+    result = _.callback<TResult>(Function, any);
+    result = _(Function).callback<TResult>().value();
+    result = _(Function).callback<TResult>(any).value();
+}
+{
+    let result: (object: any) => TResult;
+    result = _.callback<TResult>('');
+    result = _.callback<TResult>('', any);
+    result = _('').callback<TResult>().value();
+    result = _('').callback<TResult>(any).value();
+}
+{
+    let result: (object: any) => boolean;
+    result = _.callback({});
+    result = _.callback({}, any);
+    result = _({}).callback().value();
+    result = _({}).callback(any).value();
+}
 
 // _.constant
 result = <() => number>_.constant<number>(1);
@@ -1992,6 +2015,29 @@ result = <() => {}>_({}).constant<{}>();
     result = _<boolean>([]).identity();
 }
 
+// _.iteratee
+{
+    let result: (...args: any[]) => TResult;
+    result = _.iteratee<TResult>(Function);
+    result = _.iteratee<TResult>(Function, any);
+    result = _(Function).iteratee<TResult>().value();
+    result = _(Function).iteratee<TResult>(any).value();
+}
+{
+    let result: (object: any) => TResult;
+    result = _.iteratee<TResult>('');
+    result = _.iteratee<TResult>('', any);
+    result = _('').iteratee<TResult>().value();
+    result = _('').iteratee<TResult>(any).value();
+}
+{
+    let result: (object: any) => boolean;
+    result = _.iteratee({});
+    result = _.iteratee({}, any);
+    result = _({}).iteratee().value();
+    result = _({}).iteratee(any).value();
+}
+
 // _.method
 class TestMethod {
     a = {

lodash/lodash.d.ts

@@ -8170,6 +8170,64 @@ declare module _ {
         attempt<TResult>(): TResult|Error;
     }
 
+    //_.callback
+    interface LoDashStatic {
+        /**
+         * Creates a function that invokes func with the this binding of thisArg and arguments of the created function.
+         * If func is a property name the created callback returns the property value for a given element. If func is
+         * an object the created callback returns true for elements that contain the equivalent object properties,
+         * otherwise it returns false.
+         *
+         * @param func The value to convert to a callback.
+         * @param thisArg The this binding of func.
+         * @result Returns the callback.
+         */
+        callback<TResult>(
+            func: Function,
+            thisArg?: any
+        ): (...args: any[]) => TResult;
+
+        /**
+         * @see _.callback
+         */
+        callback<TResult>(
+            func: string,
+            thisArg?: any
+        ): (object: any) => TResult;
+
+        /**
+         * @see _.callback
+         */
+        callback(
+            func: Object,
+            thisArg?: any
+        ): (object: any) => boolean;
+
+        /**
+         * @see _.callback
+         */
+        callback<TResult>(): (value: TResult) => TResult;
+    }
+
+    interface LoDashWrapper<T> {
+        /**
+         * @see _.callback
+         */
+        callback<TResult>(thisArg?: any): LoDashObjectWrapper<(object: any) => TResult>;
+    }
+
+    interface LoDashObjectWrapper<T> {
+        /**
+         * @see _.callback
+         */
+        callback(thisArg?: any): LoDashObjectWrapper<(object: any) => boolean>;
+
+        /**
+         * @see _.callback
+         */
+        callback<TResult>(thisArg?: any): LoDashObjectWrapper<(...args: any[]) => TResult>;
+    }
+
     //_.identity
     interface LoDashStatic {
         /**
@@ -8201,6 +8259,57 @@ declare module _ {
         identity(): T;
     }
 
+    //_.iteratee
+    interface LoDashStatic {
+        /**
+         * @see _.callback
+         */
+        iteratee<TResult>(
+            func: Function,
+            thisArg?: any
+        ): (...args: any[]) => TResult;
+
+        /**
+         * @see _.callback
+         */
+        iteratee<TResult>(
+            func: string,
+            thisArg?: any
+        ): (object: any) => TResult;
+
+        /**
+         * @see _.callback
+         */
+        iteratee(
+            func: Object,
+            thisArg?: any
+        ): (object: any) => boolean;
+
+        /**
+         * @see _.callback
+         */
+        iteratee<TResult>(): (value: TResult) => TResult;
+    }
+
+    interface LoDashWrapper<T> {
+        /**
+         * @see _.callback
+         */
+        iteratee<TResult>(thisArg?: any): LoDashObjectWrapper<(object: any) => TResult>;
+    }
+
+    interface LoDashObjectWrapper<T> {
+        /**
+         * @see _.callback
+         */
+        iteratee(thisArg?: any): LoDashObjectWrapper<(object: any) => boolean>;
+
+        /**
+         * @see _.callback
+         */
+        iteratee<TResult>(thisArg?: any): LoDashObjectWrapper<(...args: any[]) => TResult>;
+    }
+
     //_.method
     interface LoDashStatic {
         /**