Merge pull request #5284 from splintor/master

Add lodash _.partition

lodash/lodash-tests.ts

@@ -624,6 +624,34 @@ result = <number>_(stoogesAgesDict).sum('age');
 result = <string[]>_.pluck(stoogesAges, 'name');
 result = <string[]>_(stoogesAges).pluck('name').value();
 
+// _.partition
+result = <string[][]>_.partition<string>('abcd', (n) => n < 'c');
+result = <string[][]>_.partition<string>(['a', 'b', 'c', 'd'], (n) => n < 'c');
+result = <number[][]>_.partition<number>([1, 2, 3, 4], (n) => n < 3);
+result = <number[][]>_.partition<number>({0: 1, 1: 2, 2: 3, 3: 4, length: 4}, (n) => n < 3);
+result = <number[][]>_.partition<number>({a: 1, b: 2, c: 3, d: 4}, (n) => n < 3);
+result = <{a: number}[][]>_.partition<{a: number}, {a: number}>([{a: 1}, {a: 2}], {a: 2});
+result = <{a: number}[][]>_.partition<{a: number}, {a: number}>({0: {a: 1}, 1: {a: 2}, length: 2}, {a: 2});
+result = <{a: number}[][]>_.partition<{a: number}, {a: number}>({0: {a: 1}, 1: {a: 2}}, {a: 2});
+result = <{a: number}[][]>_.partition<{a: number}>([{a: 1}, {a: 2}], 'a');
+result = <{a: number}[][]>_.partition<{a: number}>([{a: 1}, {a: 2}], 'a', 2);
+result = <{a: number}[][]>_.partition<{a: number}>({0: {a: 1}, 1: {a: 2}, length: 2}, 'a');
+result = <{a: number}[][]>_.partition<{a: number}>({0: {a: 1}, 1: {a: 2}, length: 2}, 'a', 2);
+result = <{a: number}[][]>_.partition<{a: number}>({0: {a: 1}, 1: {a: 2}}, 'a');
+result = <{a: number}[][]>_.partition<{a: number}>({0: {a: 1}, 1: {a: 2}}, 'a', 2);
+result = <string[][]>_('abcd').partition((n) => n < 'c').value();
+result = <string[][]>_(['a', 'b', 'c', 'd']).partition((n) => n < 'c').value();
+result = <number[][]>_([1, 2, 3, 4]).partition((n) => n < 3).value();
+result = <number[][]>_({0: 1, 1: 2, 2: 3, 3: 4, length: 4}).partition<number>((n) => n < 3).value();
+result = <number[][]>_({a: 1, b: 2, c: 3, d: 4}).partition<number>((n) => n < 3).value();
+result = <{a: number}[][]>_([{a: 1}, {a: 2}]).partition<{a: number}>({a: 2}).value();
+result = <{a: number}[][]>_({0: {a: 1}, 1: {a: 2}, length: 2}).partition<{a: number}, {a: number}>({a: 2}).value();
+result = <{a: number}[][]>_({0: {a: 1}, 1: {a: 2}}).partition<{a: number}, {a: number}>({a: 2}).value();
+result = <{a: number}[][]>_([{a: 1}, {a: 2}]).partition('a').value();
+result = <{a: number}[][]>_([{a: 1}, {a: 2}]).partition('a', 2).value();
+result = <{a: number}[][]>_({0: {a: 1}, 1: {a: 2}}).partition<{a: number}>('a').value();
+result = <{a: number}[][]>_({0: {a: 1}, 1: {a: 2}}).partition<{a: number}>('a', 2).value();
+
 interface ABC {
     [index: string]: number;
     a: number;

lodash/lodash.d.ts

@@ -4081,6 +4081,154 @@ declare module _ {
             property: string): LoDashArrayWrapper<TResult>;
     }
 
+    //_.partition
+    interface LoDashStatic {
+        /**
+        * Creates an array of elements split into two groups, the first of which contains elements predicate returns truthy for,
+        * while the second of which contains elements predicate returns falsey for.
+        * The predicate is bound to thisArg and invoked with three arguments: (value, index|key, collection).
+        *
+        * If a property name is provided for predicate the created _.property style callback
+        * returns the property value of the given element.
+        *
+        * If a value is also provided for thisArg the created _.matchesProperty style callback
+        * returns true for elements that have a matching property value, else false.
+        *
+        * If an object is provided for predicate the created _.matches style callback returns
+        * true for elements that have the properties of the given object, else false.
+        *
+        * @param collection The collection to iterate over.
+        * @param callback The function called per iteration.
+        * @param thisArg The this binding of predicate.
+        * @return Returns the array of grouped elements.
+        **/
+        partition<T>(
+            collection: List<T>,
+            callback: ListIterator<T, boolean>,
+            thisArg?: any): T[][];
+
+        /**
+         * @see _.partition
+         **/
+        partition<T>(
+            collection: Dictionary<T>,
+            callback: DictionaryIterator<T, boolean>,
+            thisArg?: any): T[][];
+
+        /**
+         * @see _.partition
+         **/
+        partition<W, T>(
+            collection: List<T>,
+            whereValue: W): T[][];
+
+        /**
+         * @see _.partition
+         **/
+        partition<W, T>(
+            collection: Dictionary<T>,
+            whereValue: W): T[][];
+
+        /**
+         * @see _.partition
+         **/
+        partition<T>(
+            collection: List<T>,
+            path: string,
+            srcValue: any): T[][];
+
+        /**
+         * @see _.partition
+         **/
+        partition<T>(
+            collection: Dictionary<T>,
+            path: string,
+            srcValue: any): T[][];
+
+        /**
+         * @see _.partition
+         **/
+        partition<T>(
+            collection: List<T>,
+            pluckValue: string): T[][];
+
+        /**
+         * @see _.partition
+         **/
+        partition<T>(
+            collection: Dictionary<T>,
+            pluckValue: string): T[][];
+    }
+
+    interface LoDashStringWrapper {
+        /**
+         * @see _.partition
+         */
+        partition(
+            callback: ListIterator<string, boolean>,
+            thisArg?: any): LoDashArrayWrapper<string[]>;
+    }
+
+    interface LoDashArrayWrapper<T> {
+        /**
+         * @see _.partition
+         */
+        partition(
+            callback: ListIterator<T, boolean>,
+            thisArg?: any): LoDashArrayWrapper<T[]>;
+        /**
+         * @see _.partition
+         */
+        partition<W>(
+            whereValue: W): LoDashArrayWrapper<T[]>;
+        /**
+         * @see _.partition
+         */
+        partition(
+            path: string,
+            srcValue: any): LoDashArrayWrapper<T[]>;
+        /**
+         * @see _.partition
+         */
+        partition(
+            pluckValue: string): LoDashArrayWrapper<T[]>;
+    }
+
+    interface LoDashObjectWrapper<T> {
+        /**
+         * @see _.partition
+         */
+        partition<TResult>(
+            callback: ListIterator<TResult, boolean>,
+            thisArg?: any): LoDashArrayWrapper<TResult[]>;
+
+        /**
+         * @see _.partition
+         */
+        partition<TResult>(
+            callback: DictionaryIterator<TResult, boolean>,
+            thisArg?: any): LoDashArrayWrapper<TResult[]>;
+
+        /**
+         * @see _.partition
+         */
+        partition<W, TResult>(
+            whereValue: W): LoDashArrayWrapper<TResult[]>;
+
+        /**
+         * @see _.partition
+         */
+        partition<TResult>(
+            path: string,
+            srcValue: any): LoDashArrayWrapper<TResult[]>;
+
+        /**
+         * @see _.partition
+         */
+        partition<TResult>(
+            pluckValue: string): LoDashArrayWrapper<TResult[]>;
+    }
+
     //_.reduce
     interface LoDashStatic {
         /**