time-to-botec

Benchmark sampling in different programming languages
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wrapperAt.js (1341B)

      1 var LazyWrapper = require('./_LazyWrapper'),
      2     LodashWrapper = require('./_LodashWrapper'),
      3     baseAt = require('./_baseAt'),
      4     flatRest = require('./_flatRest'),
      5     isIndex = require('./_isIndex'),
      6     thru = require('./thru');
      7 
      8 /**
      9  * This method is the wrapper version of `_.at`.
     10  *
     11  * @name at
     12  * @memberOf _
     13  * @since 1.0.0
     14  * @category Seq
     15  * @param {...(string|string[])} [paths] The property paths to pick.
     16  * @returns {Object} Returns the new `lodash` wrapper instance.
     17  * @example
     18  *
     19  * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
     20  *
     21  * _(object).at(['a[0].b.c', 'a[1]']).value();
     22  * // => [3, 4]
     23  */
     24 var wrapperAt = flatRest(function(paths) {
     25   var length = paths.length,
     26       start = length ? paths[0] : 0,
     27       value = this.__wrapped__,
     28       interceptor = function(object) { return baseAt(object, paths); };
     29 
     30   if (length > 1 || this.__actions__.length ||
     31       !(value instanceof LazyWrapper) || !isIndex(start)) {
     32     return this.thru(interceptor);
     33   }
     34   value = value.slice(start, +start + (length ? 1 : 0));
     35   value.__actions__.push({
     36     'func': thru,
     37     'args': [interceptor],
     38     'thisArg': undefined
     39   });
     40   return new LodashWrapper(value, this.__chain__).thru(function(array) {
     41     if (length && !array.length) {
     42       array.push(undefined);
     43     }
     44     return array;
     45   });
     46 });
     47 
     48 module.exports = wrapperAt;