8-10 WPS JSA 正则表达式:贪婪匹配

8-10 WPS JSA 正则表达式:贪婪匹配

一、 贪婪匹配

贪婪匹配就是尽可能多地匹配，同时也允许正则表达式剩余的部分继续匹配，同一字符段末尾匹配不符合要求，就不匹配。

{n,m}：匹配前项至少n次，但不超过m次

{n,}：匹配前项n或更多次

{n}：匹配前项恰好n次

？：匹配前项零或一次，等价于{0,1)

+：匹配前项一或多次，等价于{1,},就是连续的

*：匹配前项零或多次，等价于{0,}

二、基础测试

function test(){

var s="姓名:赵多多，年龄:35，工号:BH035，手机:17773050505，工龄:15";

var s1="Closs:5-6-6,寝室:5549"

var a1=s.match(/\d{3,4}/g);//{n,m}：匹配前项至少n次，但不超过m次

//局部变量：a1=["035","1777","3050","505"]，类型：Array/object

var a2=s.match(/\d{3,}/g);//{n,}：匹配前项n或更多次

//局部变量：a2=["035","17773050505"]，类型：Array/object

var a3=s.match(/\d{3}/g);//{n}：匹配前项恰好n次

//局部变量：a3=["035","177","730","505"]，类型：Array/object

var a4=s.match(/\d+/g);//+：匹配前项一或多次，等价于{1,},就是连续的

//局部变量：a4=["35","035","17773050505","15"]，类型：Array/object

var a5=s1.match(/(\d-?)+/g);//？：匹配前项零或一次，等价于{0,1)

//局部变量：a5=["5-6-6","5549"]，类型：Array/object

var a6=s1.match(/(\d-?)*/g);//*：匹配前项零或多次，等价于{0,}

//局部变量：a6=["","","","","","","5-6-6","","","","","5549",""]，类型：Array/object

}

javascript 复制代码

function test(){
var s="姓名:赵多多，年龄:35，工号:BH035，手机:17773050505，工龄:15";
var s1="Closs:5-6-6,寝室:5549"
var a1=s.match(/\d{3,4}/g);//{n,m}：匹配前项至少n次，但不超过m次
//局部变量：a1=["035","1777","3050","505"]，类型：Array/object

var a2=s.match(/\d{3,}/g);//{n,}：匹配前项n或更多次
//局部变量：a2=["035","17773050505"]，类型：Array/object

var a3=s.match(/\d{3}/g);//{n}：匹配前项恰好n次
//局部变量：a3=["035","177","730","505"]，类型：Array/object

var a4=s.match(/\d+/g);//+：匹配前项一或多次，等价于{1,},就是连续的
//局部变量：a4=["35","035","17773050505","15"]，类型：Array/object

var a5=s1.match(/(\d-?)+/g);//？：匹配前项零或一次，等价于{0,1)
//局部变量：a5=["5-6-6","5549"]，类型：Array/object

var a6=s1.match(/(\d-?)*/g);//*：匹配前项零或多次，等价于{0,}
//局部变量：a6=["","","","","","","5-6-6","","","","","5549",""]，类型：Array/object
}