regular expression
in Programming on Javascript
Javascript Basic
Module
Regular Expression
two ways to make regular expression in JS.
var pattern = /a/;
// If the regular expression remains constant, using this can improve performance.
var pattern = new RegExp('a');
// same expression.
var pattern = /a/;
pattern.exec('bcdef'); //null
pattern.test('abcde'); //true
pattern.test('bcde'); //false
String.match()
var pattern = /a/;
var str = 'abcdef';
str.match(pattern); //
String.replace()
var pattern = /a/;
var str = 'abcdef';
str.replace(pattern, 'A');
Option
Option i -> (No matter letter is big or small)
Option g -> (print all result)
Regular expression visualizer using railroad diagrams.
reg exp simulator online
(\w+)\s(\w+)
You can find information in detail below.
regular expressions