time-to-botec

Benchmark sampling in different programming languages
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_hasPath.js (1085B)

      1 var castPath = require('./_castPath'),
      2     isArguments = require('./isArguments'),
      3     isArray = require('./isArray'),
      4     isIndex = require('./_isIndex'),
      5     isLength = require('./isLength'),
      6     toKey = require('./_toKey');
      7 
      8 /**
      9  * Checks if `path` exists on `object`.
     10  *
     11  * @private
     12  * @param {Object} object The object to query.
     13  * @param {Array|string} path The path to check.
     14  * @param {Function} hasFunc The function to check properties.
     15  * @returns {boolean} Returns `true` if `path` exists, else `false`.
     16  */
     17 function hasPath(object, path, hasFunc) {
     18   path = castPath(path, object);
     19 
     20   var index = -1,
     21       length = path.length,
     22       result = false;
     23 
     24   while (++index < length) {
     25     var key = toKey(path[index]);
     26     if (!(result = object != null && hasFunc(object, key))) {
     27       break;
     28     }
     29     object = object[key];
     30   }
     31   if (result || ++index != length) {
     32     return result;
     33   }
     34   length = object == null ? 0 : object.length;
     35   return !!length && isLength(length) && isIndex(key, length) &&
     36     (isArray(object) || isArguments(object));
     37 }
     38 
     39 module.exports = hasPath;