|
1
|
var before = require('./before');
|
|
2
|
|
|
3
|
/**
|
|
4
|
* Creates a function that is restricted to invoking `func` once. Repeat calls
|
|
5
|
* to the function return the value of the first invocation. The `func` is
|
|
6
|
* invoked with the `this` binding and arguments of the created function.
|
|
7
|
*
|
|
8
|
* @static
|
|
9
|
* @memberOf _
|
|
10
|
* @since 0.1.0
|
|
11
|
* @category Function
|
|
12
|
* @param {Function} func The function to restrict.
|
|
13
|
* @returns {Function} Returns the new restricted function.
|
|
14
|
* @example
|
|
15
|
*
|
|
16
|
* var initialize = _.once(createApplication);
|
|
17
|
* initialize();
|
|
18
|
* initialize();
|
|
19
|
* // => `createApplication` is invoked once
|
|
20
|
*/
|
|
21
|
function once(func) {
|
|
22
|
return before(2, func);
|
|
23
|
}
|
|
24
|
|
|
25
|
module.exports = once;
|