How does js use rules to find the content specified in the string

1. The string str= "zz=aaa,bb=bbb,cc=ccc;User=ZZZ&zz=aaa1&bb=bbb1&cc=ccc1"
2. To implement, for example, I pass in the parameter zz, and find the value of aaa1 in the zz=aaa1 after User=ZZZ. How to write the corresponding rule?

Regular-expression javascript
Feb.27,2021 
/User=ZZZ.*zz=(\w+)/
str="zz=aaa,bb=bbb,cc=ccc;User=ZZZ&zz=aaa1&bb=bbb1&cc=ccc1";
    function find(str){
        var reg=/([^?=&]+)=([^?=&]+)/g;
        var result=null;
        var o={};
        while((result=reg.exec(str))!=null){
            o[result[1]]=result[2];
        }
        return function getByName(name){
            return o[name];
        }
    }
    var s=find(str);
    console.log(s('zz'),s('cc'));

because you don't have an accurate description of the problem, the specification written by others may not be appropriate. 

function getValue(str,filed){
var regex=new RegExp("&"+filed+"=([^&]*)","g");
var match=null;
var result=[];
while((match=regex.exec(str))!=null){
    result.push(match[1]);
}
return result;
}

var str="zz=aaa,bb=bbb,cc=ccc;User=ZZZ&zz=aaa1&bb=bbb1&cc=ccc1";
var filed="zz";
getValue(str,filed);
var str="zz=aaa,bb=bbb,cc=ccc;User=ZZZ&zz=aaa1&bb=bbb1&cc=ccc1";
var reg = /User=ZZZ&zz=(\w+)/;
var reg2 = /User=.*&zz=(\w+)/;   //User

reg.exec(str)[1];     //aaa1
reg2.exec(str)[1];    //aaa1

Previous: Wechat vouchers are successfully issued through the advanced interface. How do users receive notifications of successful issuance?

Next: Does mysql support whether the query condition is an object?

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
© 2021 CodesHelper
Advertising Contact us About us
Menu