jQuery.merge()

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jQuery.merge()

Categories: Utilities

jQuery.merge( first, second ) Returns: Array

Description: Merge the contents of two arrays together into the first array.

  • version added: 1.0jQuery.merge( first, second )

    • first
      Type: Array
      The first array to merge, the elements of second added.
    • second
      Type: Array
      The second array to merge into the first, unaltered.

The $.merge() operation forms an array that contains all elements from the two arrays. The orders of items in the arrays are preserved, with items from the second array appended. The $.merge() function is destructive. It alters the first parameter to add the items from the second.

If you need the original first array, make a copy of it before calling $.merge(). Fortunately, $.merge() itself can be used for this duplication:

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                                    var newArray = $.merge([], oldArray);

This shortcut creates a new, empty array and merges the contents of oldArray into it, effectively cloning the array.

Prior to jQuery 1.4, the arguments should be true Javascript Array objects; use $.makeArray if they are not.

Examples:

Example: Merges two arrays, altering the first argument.

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                                      $.merge( [0,1,2], [2,3,4] )

Result:

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                                      [0,1,2,2,3,4]

Example: Merges two arrays, altering the first argument.

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                                      $.merge( [3,2,1], [4,3,2] )

Result:

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                                      [3,2,1,4,3,2]

Example: Merges two arrays, but uses a copy, so the original isn't altered.

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                                      var first = ['a','b','c'];
                                    

                                  

                                  

                                    

                                      var second = ['d','e','f'];
                                    

                                  

                                  

                                    

                                      $.merge( $.merge([],first), second);

Result:

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                                      ["a","b","c","d","e","f"]
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