# Code coverage report for lib/utils/merge.js

## Statements: 95.24% (20 / 21) Branches: 90% (18 / 20) Functions: 100% (4 / 4) Lines: 95% (19 / 20)

All files » lib/utils/ » merge.js

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    451

    1

    1
    31

    1
    40

    40
    567
    530

    40
    93

    93

    31

    31
    22
    4

    9
    5

    40
     var clone = require('./clone');

    module.exports = merge;

    function typesMatch(a, b) {
      return (typeof a === typeof b) && (Array.isArray(a) === Array.isArray(b));
    }

    /**
     * A deep merge of the source based on the target.
     * @param  {Object} source   [description]
     * @param  {Object} target   [description]
     * @return {Object}          [description]
     */
    function merge(source, target, result) {
      Eif (result === undefined) result = clone(source);

      // merge missing values from the target to the source
      Object.getOwnPropertyNames(target).forEach(function (key) {
        if (source[key] === undefined) {
          result[key] = target[key];
        }
      });

      Object.getOwnPropertyNames(source).forEach(function (key) {
        var value = source[key];

        if (target[key] && typesMatch(value, target[key])) {
          // merge empty values
          Iif (value === '') {
            result[key] = target[key];
          }

          if (Array.isArray(value)) {
            if (value.length === 0 && target[key].length) {
              result[key] = target[key].slice(0);
            }
          } else if (typeof value === "object") {
            result[key] = merge(value, target[key]);
          }
        }
      });

      return result;
    }