Merge pull request #5098 from chrootsu/lodash-constant

lodash: changed _.constant() method (added to the chainable wrapper, ad…

lodash/lodash-tests.ts

@@ -1373,6 +1373,18 @@ result = <string[]>_.words('fred, barney, & pebbles', /[^, ]+/g);
 * Utilities *
 ***********/
 
+// _.constant
+result = <() => number>_.constant<number>(1);
+result = <() => string>_.constant<string>('a');
+result = <() => boolean>_.constant<boolean>(true);
+result = <() => any[]>_.constant<any[]>([]);
+result = <() => {}>_.constant<{}>({});
+result = <() => number>_(1).constant<number>();
+result = <() => string>_('a').constant<string>();
+result = <() => boolean>_(true).constant<boolean>();
+result = <() => any[]>_(['a']).constant<any[]>();
+result = <() => {}>_({}).constant<{}>();
+
 result = <string>_.VERSION;
 result = <_.Support>_.support;
 result = <_.TemplateSettings>_.templateSettings;

lodash/lodash.d.ts

@@ -6990,11 +6990,20 @@ declare module _ {
     //_.constant
     interface LoDashStatic {
         /**
-         * Creates a function that returns value..
-         **/
+         * Creates a function that returns value.
+         * @param value The value to return from the new function.
+         * @return Returns the new function.
+         */
         constant<T>(value: T): () => T;
     }
 
+    interface LoDashWrapperBase<T, TWrapper> {
+        /**
+         * @see _.constant
+         */
+        constant<TResult>(): () => TResult;
+    }
+
     //_.create
     interface LoDashStatic {
         /**