标签：pen var bsp 数组 span div strong asc dex
目录：
一、JavaScript正则表达式
内容：
一、JavaScript正则表达式
1、test
判断字符串是否符合规定的正则表达式
例子：
rep = /^\d+$/
rep.test(‘123‘)返回true
2、exec
获取匹配的数据，在匹配时，默认只能匹配到第一个即返回，且匹配值以数组形式存在
例子：分组匹配，会匹配两次，第一次匹配整体，第二次会将分组内容单独匹配出来
test = ‘JavaScript is more fun than Java or JavaBeans!‘ "JavaScript is more fun than Java or JavaBeans!" var pattern = /\bJava\w*\b/ undefined pattern.exec(test) 输出：["JavaScript", index: 0, input: "JavaScript is more fun than Java or JavaBeans!"] var pattern = /\bJava(\w*)\b/ pattern.exec(test) 输出：(2) ["JavaScript", "Script", index: 0, input: "JavaScript is more fun than Java or JavaBeans!"]
例子2：全局匹配 在匹配模板后面加g
test = ‘JavaScript is more fun than Java or JavaBeans!‘ "JavaScript is more fun than Java or JavaBeans!" var pattern = /\bJava\w*\b/g undefined pattern.exec(test) ["JavaScript", index: 0, input: "JavaScript is more fun than Java or JavaBeans!"] pattern.exec(test) ["Java", index: 28, input: "JavaScript is more fun than Java or JavaBeans!"] pattern.exec(test) ["JavaBeans", index: 36, input: "JavaScript is more fun than Java or JavaBeans!"]
var pattern = /\bJava(\w*)\b/g undefined test = ‘JavaScript is more fun than Java or JavaBeans!‘ "JavaScript is more fun than Java or JavaBeans!" pattern.exec(test) (2) ["JavaScript", "Script", index: 0, input: "JavaScript is more fun than Java or JavaBeans!"] pattern.exec(test) (2) ["Java", "", index: 28, input: "JavaScript is more fun than Java or JavaBeans!"] pattern.exec(test) (2) ["JavaBeans", "Beans", index: 36, input: "JavaScript is more fun than Java or JavaBeans!"]
二、BootStrap
- CSS
- JS
标签：pen var bsp 数组 span div strong asc dex
原文地址：http://www.cnblogs.com/xiaopi-python/p/7072600.html
