Array.prototype.splice

Removes elements from an array and, if provided, inserts new elements in their place, returning the deleted elements.

Syntax

splice(start, deleteCount, ...items?)

Parameters

• start

  The index in the array from which to start removing elements.

• deleteCount

  The number of elements to remove (may be 0 if only insertion is needed ).

• …items optional variadic

  Elements to insert into the array in place of the deleted elements.

Return value

An array containing the elements that were deleted.

Examples

let a = ["tea", "coffee", "juice"]
a.splice(1, 1) // remove "coffee"
print(a)

tea,juice

let a = ["tea", "coffee", "juice"]
a.splice(2, 1, "milk") // replace "juice" with "milk"
print(a)

tea,coffee,milk

let a = ["tea", "coffee", "juice"]
a.splice(2, 0, "milk", "soda") // insert "milk" and "soda" after "coffee"
print(a)

tea,coffee,milk,soda,juice