time-to-botec

Benchmark sampling in different programming languages
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once.js (665B)

      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;