A function that returns its first argument. This function is useful when writing code in the functional style.
function transformer(transformationFn, value) { return (transformationFn || angular.identity)(value); }; // E.g. function getResult(fn, input) { return (fn || angular.identity)(input); }; getResult(function(n) { return n * 2; }, 21); // returns 42 getResult(null, 21); // returns 21 getResult(undefined, 21); // returns 21
angular.identity(value);
Param | Type | Details |
---|---|---|
value | * | to be returned. |
* |
the value passed in. |
© 2010–2017 Google, Inc.
Licensed under the Creative Commons Attribution License 4.0.
https://code.angularjs.org/1.5.11/docs/api/ng/function/angular.identity