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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"]
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var colors=["red","blue"];
var index=1;
//insert "white" at index 1
colors.splice(index, 0, "white"); //colors = ["red", "white", "blue"]
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// 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"]
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var list = ["foo", "bar"];
list.push("baz");
["foo", "bar", "baz"] // result
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// Add to the start of an array
Array.unshift(element);
// Add to the end of an array
Array.push(element);
// Add to a specified location
Array.splice(start_position, 0, new_element );
// Add with concat method without mutating original array
let newArray = [].concat(Array, element);
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<!DOCTYPE html>
<html>
<body>
<p>In this code we will see how to push an element to array</p>
<button onclick="pushElementToArray()" id="btnClick">Click</button>
<p id="pId"></p>
<script>
var days = ["Sunday", "Monday", "Tuesday", "Wednsday"];
document.getElementById("pId").innerHTML = days;
function pushElementToArray() {
days.push("Saturday");
document.getElementById("pId").innerHTML = days;
}
</script>
</body>
</html>