JavaScript系列：正则表达式

时间：2016-03-21 13:47:36 阅读：246 评论：0 收藏：0 [点我收藏+]

function testExecResultType() {

var txt = "mom and dad and baby";

var pattern = /mom (and day (and baby)?)?/ig;

var match = pattern.exec(txt);

document.writeln(" match‘s type is instanceof array:" + (match instanceof Array));

document.writeln(" Array.isArray(matches):" + Array.isArray(match));

}

function testTelNum() {

var p1 = /^1\d{10}$/g;

var pattern = new RegExp(p1.source, "g");

var telNum1 = "13088888888";

var telNum2 = "13300008888";

document.writeln(" " + telNum1 + " is telNum:" + pattern.test(telNum1));

pattern.lastIndex = 0;

document.writeln(" " + telNum2 + " is telNum:" + pattern.test(telNum2));

}

function testIfIsPatternObjectIsGlobal() {

var p = /\w+@\w+\.com/g;

var mail = "zhangsan@amail.com";

document.writeln(" " + mail + " is mail?" + p.test(mail));

document.writeln(" lastIndex: " + p.lastIndex);

p = /^1\d{10}/g;

document.writeln(" lastIndex: " + p.lastIndex);

var telNum = "13088888888";

document.writeln(" " + telNum +" is telNum? " + p.test(telNum));

}

testIfIsPatternObjectIsGlobal();

//testTelNum();

//testExecResultType();

原文：http://www.cnblogs.com/strinkbug/p/5301333.html

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