time-to-botec

Benchmark sampling in different programming languages
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isUndefined.js (416B)

      1 /**
      2  * Checks if `value` is `undefined`.
      3  *
      4  * @static
      5  * @since 0.1.0
      6  * @memberOf _
      7  * @category Lang
      8  * @param {*} value The value to check.
      9  * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
     10  * @example
     11  *
     12  * _.isUndefined(void 0);
     13  * // => true
     14  *
     15  * _.isUndefined(null);
     16  * // => false
     17  */
     18 function isUndefined(value) {
     19   return value === undefined;
     20 }
     21 
     22 module.exports = isUndefined;