time-to-botec

Benchmark sampling in different programming languages
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_baseMerge.js (1328B)

      1 var Stack = require('./_Stack'),
      2     assignMergeValue = require('./_assignMergeValue'),
      3     baseFor = require('./_baseFor'),
      4     baseMergeDeep = require('./_baseMergeDeep'),
      5     isObject = require('./isObject'),
      6     keysIn = require('./keysIn'),
      7     safeGet = require('./_safeGet');
      8 
      9 /**
     10  * The base implementation of `_.merge` without support for multiple sources.
     11  *
     12  * @private
     13  * @param {Object} object The destination object.
     14  * @param {Object} source The source object.
     15  * @param {number} srcIndex The index of `source`.
     16  * @param {Function} [customizer] The function to customize merged values.
     17  * @param {Object} [stack] Tracks traversed source values and their merged
     18  *  counterparts.
     19  */
     20 function baseMerge(object, source, srcIndex, customizer, stack) {
     21   if (object === source) {
     22     return;
     23   }
     24   baseFor(source, function(srcValue, key) {
     25     stack || (stack = new Stack);
     26     if (isObject(srcValue)) {
     27       baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
     28     }
     29     else {
     30       var newValue = customizer
     31         ? customizer(safeGet(object, key), srcValue, (key + ''), object, source, stack)
     32         : undefined;
     33 
     34       if (newValue === undefined) {
     35         newValue = srcValue;
     36       }
     37       assignMergeValue(object, key, newValue);
     38     }
     39   }, keysIn);
     40 }
     41 
     42 module.exports = baseMerge;