time-to-botec

Benchmark sampling in different programming languages
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isFunction.js (993B)

      1 var baseGetTag = require('./_baseGetTag'),
      2     isObject = require('./isObject');
      3 
      4 /** `Object#toString` result references. */
      5 var asyncTag = '[object AsyncFunction]',
      6     funcTag = '[object Function]',
      7     genTag = '[object GeneratorFunction]',
      8     proxyTag = '[object Proxy]';
      9 
     10 /**
     11  * Checks if `value` is classified as a `Function` object.
     12  *
     13  * @static
     14  * @memberOf _
     15  * @since 0.1.0
     16  * @category Lang
     17  * @param {*} value The value to check.
     18  * @returns {boolean} Returns `true` if `value` is a function, else `false`.
     19  * @example
     20  *
     21  * _.isFunction(_);
     22  * // => true
     23  *
     24  * _.isFunction(/abc/);
     25  * // => false
     26  */
     27 function isFunction(value) {
     28   if (!isObject(value)) {
     29     return false;
     30   }
     31   // The use of `Object#toString` avoids issues with the `typeof` operator
     32   // in Safari 9 which returns 'object' for typed arrays and other constructors.
     33   var tag = baseGetTag(value);
     34   return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
     35 }
     36 
     37 module.exports = isFunction;