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I would like to insert a string into an array at a specific index. How can I do that?

I tried to use push()

lilly
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1 Answers1

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Well, thats pretty easy. Assuming you have an array with 5 objects inside and you want to insert a string at index 2 you can simply use javascripts array splice method:

var array = ['foo', 'bar', 1, 2, 3],
        insertAtIndex = 2,
        stringToBeInserted = 'someString';

// insert string 'someString' into the array at index 2
array.splice( insertAtIndex, 0, stringToBeInserted );

Your result will be now:

['foo', 'bar', 'someString', 1, 2, 3]

FYI: The push() method you used just adds new items to the end of an array (and returns the new length)

nils
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    Note that the returned value from `splice` function is an empty array. `splice` directly applies the changes to the array. – zed Jan 06 '17 at 07:36