time-to-botec

Benchmark sampling in different programming languages
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_arrayLikeKeys.js (1778B)

      1 var baseTimes = require('./_baseTimes'),
      2     isArguments = require('./isArguments'),
      3     isArray = require('./isArray'),
      4     isBuffer = require('./isBuffer'),
      5     isIndex = require('./_isIndex'),
      6     isTypedArray = require('./isTypedArray');
      7 
      8 /** Used for built-in method references. */
      9 var objectProto = Object.prototype;
     10 
     11 /** Used to check objects for own properties. */
     12 var hasOwnProperty = objectProto.hasOwnProperty;
     13 
     14 /**
     15  * Creates an array of the enumerable property names of the array-like `value`.
     16  *
     17  * @private
     18  * @param {*} value The value to query.
     19  * @param {boolean} inherited Specify returning inherited property names.
     20  * @returns {Array} Returns the array of property names.
     21  */
     22 function arrayLikeKeys(value, inherited) {
     23   var isArr = isArray(value),
     24       isArg = !isArr && isArguments(value),
     25       isBuff = !isArr && !isArg && isBuffer(value),
     26       isType = !isArr && !isArg && !isBuff && isTypedArray(value),
     27       skipIndexes = isArr || isArg || isBuff || isType,
     28       result = skipIndexes ? baseTimes(value.length, String) : [],
     29       length = result.length;
     30 
     31   for (var key in value) {
     32     if ((inherited || hasOwnProperty.call(value, key)) &&
     33         !(skipIndexes && (
     34            // Safari 9 has enumerable `arguments.length` in strict mode.
     35            key == 'length' ||
     36            // Node.js 0.10 has enumerable non-index properties on buffers.
     37            (isBuff && (key == 'offset' || key == 'parent')) ||
     38            // PhantomJS 2 has enumerable non-index properties on typed arrays.
     39            (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
     40            // Skip index properties.
     41            isIndex(key, length)
     42         ))) {
     43       result.push(key);
     44     }
     45   }
     46   return result;
     47 }
     48 
     49 module.exports = arrayLikeKeys;