ncatalin
2/23/2018 - 4:55 PM

String Methods & Concatenation

Modern JavaScript From The Beginning from Brad Traversy

index.html
content_copyfile_download
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>JavaScript Sandbox: Section 2</title>
</head>
<body>
  <h1>JavaScript Sandbox: Section 2</h1>
  
  <script src="app.js"></script>
</body>
</html>
app.js
content_copyfile_download
const firstName = 'William';
const lastName = 'Johnson';
const age = 36;
const str = 'Hello there my name is Brad';
const tags = 'web design,web development,programming';

let val;

val = firstName + lastName;

// Concatenation
val = firstName + ' ' + lastName;

// Append
val = 'Brad ';
val += 'Traversy';

val = 'Hello, my name is ' + firstName + ' and I am ' + age;

// Escaping
val =  'That\'s awesome, I can\'t wait';

// Length
val = firstName.length;

// concat()
val = firstName.concat(' ', lastName);

// Change case
val = firstName.toUpperCase();
val = firstName.toLowerCase();

val = firstName[2];

// indexOf()
val = firstName.indexOf('l');
val = firstName.lastIndexOf('l');

// charAt()
val = firstName.charAt('2');
// Get last char
val = firstName.charAt(firstName.length - 1);

// substring()
val = firstName.substring(0, 4);

// slice()
val = firstName.slice(0,4);
val = firstName.slice(-3);

// split()
val = str.split(' ');
val = tags.split(',');

// replace()
val = str.replace('Brad', 'Jack');

// includes()
val = str.includes('foo');

console.log(val);