如何在特定索引处的数组中插入项？

Question

I am looking for a Javascript array insert method, in the style of:

arr.insert(index, item)

Preferably in jQuery, but any Javascript implementation will do at this point.

转载于:https://stackoverflow.com/questions/586182/how-to-insert-an-item-into-an-array-at-a-specific-index