Example 1: insert into array js
// for me lol... pls don't delete!
// use splice to insert element
// arr.splice(index, numItemsToDelete, item);
var list = ["hello", "world"];
list.splice( 1, 0, "bye");
//result
["hello", "bye", "world"]
Example 2: javascript array add
// example:
let yourArray = [1, 2, 3];
yourArray.push(4); // yourArray = [1, 2, 3, 4]
// syntax:
// .push();
Example 3: add array to array javascript
// SPREAD OPERATOR
const list1 = ["pepe", "luis", "rua"];
const list2 = ["rojo", "verde", "azul"];
const newList = [...list1, ...list2];
// ["pepe", "luis", "rua", "rojo", "verde", "azul"]
Example 4: array insertion javascript
Array.prototype.insert = function ( index, item ) {
this.splice( index, 0, item );
};
Example 5: how to insert a value into an array javascript
var list = ["foo", "bar"];
list.push("baz");
["foo", "bar", "baz"] // result
Example 6: js insert in array
const months = ['Jan', 'March', 'April', 'June'];
months.splice(1, 0, 'Feb');
// inserts at index 1
console.log(months);
// expected output: Array ["Jan", "Feb", "March", "April", "June"]
months.splice(4, 1, 'May');
// replaces 1 element at index 4
console.log(months);
// expected output: Array ["Jan", "Feb", "March", "April", "May"]