JS insert into array at specific index

This question already has an answer here:

How to insert an item into an array at a specific index? 10 answers

---

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)

链接地址: http://www.djcxy.com/p/29306.html

上一篇: 如何在数组的索引0处推入元素

下一篇: JS在特定索引处插入数组