Array Methods to Manipulate Strings
In this lesson we will study various ways to manipulate strings using array methods in JavaScript.
Arrays have a number of methods that can be used to manipulate existing arrays.
The concat() and slice() methods
The Listing below demonstrates two of them, concat(), and slice().
Listing: Exercise/index.html
<!DOCTYPE html>
<html>
<head>
<title>Concat and slice</title>
<script>
var fruits = ["apple", "banana"];
var fruit2 = fruits.concat(["orange", "lemon"],
"pear");
console.log(fruit2.toString());
var fruit3 = fruit2.slice(2, 4);
console.log(fruit3.toString());
</script>
</head>
<body>
Listing 7-18: View the console output
</body>
</html>This code snippet produces this output:
apple,banana,orange,lemon,pearorange,lemon
The concat() method returns a new array comprised of this array joined with other arrays and values. In this listing, fruit2 is assembled from the original contents of fruits and from the items in the ["orange", "lemon"] array, plus “pear,” ...