First question
var arr = [1,2,3,4,5];arr.splice (1,2,3,4,5); arr?
This topic examines the use of array splice.
Definition and usage
The splice () method adds/deletes an item to/from the array, and then returns the item that was deleted.
Note: This method changes the original array.
Grammar
Arrayobject.splice (index,howmany,item1,....., ItemX)
Parameters |
Description |
Index |
Necessary. An integer that specifies the location of the Add/remove item, using a negative number to specify the position from the end of the array. |
Howmany |
Necessary. The number of items to delete. If set to 0, the item is not deleted. |
Item1, ..., ItemX |
Optional. Adds a new item to the array. |
return value
type |
Description |
Array |
A new array containing the deleted items, if any. |
Description
The splice () method deletes 0 or more elements starting at index and replaces the deleted elements with one or more values declared in the argument list.
If the element is removed from the Arrayobject, the array containing the deleted element is returned.
Learn with the question (I.)