ncatalin
3/8/2018 - 4:30 PM

Regular Expressions [Part 1] - Evaluation Functions

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</title>
</head>
<body>
  
  <script src="app.js"></script>
</body>
</html>
app.js
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let re;
re = /hello/;
re = /hello/i; // i =  case insensitive
// re = /hello/g; // Global search

// console.log(re);
// console.log(re.source);

// exec() - Return result in an array or null
// const result = re.exec('hello world');

// console.log(result);
// console.log(result[0]);
// console.log(result.index);
// console.log(result.input);

// test() - Returns true or false
// const result = re.test('Hello');
// console.log(result);

// match() - Return result array or null
// const str = 'Hello There';
// const result = str.match(re);
// console.log(result);

// search() - Returns index of the first match if not found retuns -1
// const str = 'Brad Hello There';
// const result = str.search(re);
// console.log(result);

// replace() - Return new string with some or all matches of a pattern
// const str = 'Hello There';
// const newStr = str.replace(re, 'Hi');
// console.log(newStr);