Function mergeWith

  • This method is like _.merge except that it accepts customizer which is invoked to produce the merged values of the destination and source properties. If customizer returns undefined merging is handled by the method instead. The customizer is invoked with seven arguments: (objValue, srcValue, key, object, source, stack).

    Example

    function customizer(objValue, srcValue) {
      if (_.isArray(objValue)) {
        return objValue.concat(srcValue);
      }
    }

    var object = {
      'fruits': ['apple'],
      'vegetables': ['beet']
    };

    var other = {
      'fruits': ['banana'],
      'vegetables': ['carrot']
    };

    _.mergeWith(object, other, customizer);
    // => { 'fruits': ['apple', 'banana'], 'vegetables': ['beet', 'carrot'] }

    Type Parameters

    • TObject

    • TSource

    Parameters

    • object: TObject

      The destination object.

    • source: TSource
    • customizer: ((value, srcValue, key, object, source) => any)

      The function to customize assigned values.

        • (value, srcValue, key, object, source): any

        • Parameters

          • value: any
          • srcValue: any
          • key: string
          • object: any
          • source: any

          Returns any

    Returns TObject & TSource

    Returns object.

  • See

    _.mergeWith

    Type Parameters

    • TObject

    • TSource1

    • TSource2

    Parameters

    • object: TObject
    • source1: TSource1
    • source2: TSource2
    • customizer: ((value, srcValue, key, object, source) => any)
        • (value, srcValue, key, object, source): any

        • Parameters

          • value: any
          • srcValue: any
          • key: string
          • object: any
          • source: any

          Returns any

    Returns TObject & TSource1 & TSource2

  • See

    _.mergeWith

    Type Parameters

    • TObject

    • TSource1

    • TSource2

    • TSource3

    Parameters

    • object: TObject
    • source1: TSource1
    • source2: TSource2
    • source3: TSource3
    • customizer: ((value, srcValue, key, object, source) => any)
        • (value, srcValue, key, object, source): any

        • Parameters

          • value: any
          • srcValue: any
          • key: string
          • object: any
          • source: any

          Returns any

    Returns TObject & TSource1 & TSource2 & TSource3

  • See

    _.mergeWith

    Type Parameters

    • TObject

    • TSource1

    • TSource2

    • TSource3

    • TSource4

    Parameters

    • object: TObject
    • source1: TSource1
    • source2: TSource2
    • source3: TSource3
    • source4: TSource4
    • customizer: ((value, srcValue, key, object, source) => any)
        • (value, srcValue, key, object, source): any

        • Parameters

          • value: any
          • srcValue: any
          • key: string
          • object: any
          • source: any

          Returns any

    Returns TObject & TSource1 & TSource2 & TSource3 & TSource4

  • See

    _.mergeWith

    Parameters

    • object: any
    • Rest ...otherArgs: any[]

    Returns any

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