[Regex Expression] Use Shorthand to Find Common Sets of Characters

转载于 2016-02-01 03:22:00 发布 · 57 阅读

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原文链接：http://www.cnblogs.com/Answer1215/p/5174335.html

本文将介绍正则表达式中字符类的常见缩写及其否定形式，包括匹配字母数字字符、非字母数字字符、空格与非空格字符等，并通过实例展示它们的应用。

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In this lesson we'll learn shorthands for common character classes as well as their negated forms.

var str = `Afewserg, %8392 ?AWE`;

var regex = /[a-zA-Z0-9]/g; 
// the same as:
var regex = /\w/g;

// Find anything but not the a-zA-Z0-9
var regex = /[^a-zA-Z0-9]/g;
// the same as
var regex = /\W/g;

var regex = /[0-9]/g;
// the same as:
var regex = /\d/g;

// Find anything but not the 0-9
var regex = /[^0-9]/g;
// the same as
var regex = /\D/g;

var regex = /\s/g; // match all the space 

// Find anything but not the space
var regex = /[^\s]/g; 
// the same as:
var regex = /\S/g;