time-to-botec

Benchmark sampling in different programming languages
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_createAssigner.js (1042B)

      1 var baseRest = require('./_baseRest'),
      2     isIterateeCall = require('./_isIterateeCall');
      3 
      4 /**
      5  * Creates a function like `_.assign`.
      6  *
      7  * @private
      8  * @param {Function} assigner The function to assign values.
      9  * @returns {Function} Returns the new assigner function.
     10  */
     11 function createAssigner(assigner) {
     12   return baseRest(function(object, sources) {
     13     var index = -1,
     14         length = sources.length,
     15         customizer = length > 1 ? sources[length - 1] : undefined,
     16         guard = length > 2 ? sources[2] : undefined;
     17 
     18     customizer = (assigner.length > 3 && typeof customizer == 'function')
     19       ? (length--, customizer)
     20       : undefined;
     21 
     22     if (guard && isIterateeCall(sources[0], sources[1], guard)) {
     23       customizer = length < 3 ? undefined : customizer;
     24       length = 1;
     25     }
     26     object = Object(object);
     27     while (++index < length) {
     28       var source = sources[index];
     29       if (source) {
     30         assigner(object, source, index, customizer);
     31       }
     32     }
     33     return object;
     34   });
     35 }
     36 
     37 module.exports = createAssigner;