add element to middle of array javascript code example

Example 1: add elements to middle of array using splice

//we can add elements to middle of  array using splice

const strings=['a','b','c','d']

//go the 2nd index,remove 0 elements and then add 'alien' to it
strings.splice(2,0,'alien')

console.log(strings) //["a", "b", "alien", "c", "d"]

//what is the time complexity ???
//worst case is O(n). if we are adding to end of array then O(1)
//in our example we added to the middle of array so O(n/2)=>O(n)

Example 2: javascript Inserting values in between an array

myArray.splice(index, itemsToDelete, item1ToAdd, item2ToAdd, ...)

Example 3: how to insert a value into an array javascript

var list = ["foo", "bar"];


list.push("baz");


["foo", "bar", "baz"] // result