regex to find a string that comes after =

Question

I´m really new to regex and I have been looking around to find an answer but either it dont work or I get some kind of error so I will try to ask the question and hopefulyl some

Answer 1

I think this should work :

([^[]+)(?:\[[^=]+=([^\]]+)\])+

Explainations :

([^[]) First, you match everything that is not a [.

(?:...)+ Then, when you find it, you're starting repeting a pattern

\[[^=] Find everything that is not an =, and discard it.

([^\]]) Find everything that is not a ] and capture it.

Answer 2

You can use this regex:

([^\[]*)\[[^=]+=([^\]]*)\]\[[^=]+=([^\]]*)\]

You can then grap matching group #1, #2 and #3

Live Demo: http://www.rubular.com/r/XNZfHcMAp8

In Javascript:

str = 'car[brand=saab][wheels=4]';
console.log('match::' + str.match(/([^[]*)\[[^=]+=([^\]]*)\]\[[^=]+=([^\]]*)\]/));

Answer 3

/([^\[]+)\[brand=([^\]]+)\]\[wheels=(\d)\]/

Works.

Try it like

var result = "car[brand=saab][wheels=4]".match(/([^\[]+)\[brand=([^\]]+)\]\[wheels=(\d)\]/)

Result would be

[ "car[brand=saab][wheels=4]", "car", "saab", "4" ]

Answer 4

.replace with a callback function is your tool of choice when parsing custom formats in javascript. Consider:

parse = function(s) {
    var result = {};
    s.replace(/^(\w+)|\[(.+?)=(.+?)\]/g, function($0, $1, $2, $3) {
        result[$2 || "kind"] = $1 || $3;
    });
    return result;
}

Example:

str = "car[brand=saab][wheels=4][price=1234][morestuff=foobar]"
console.log(parse(str))
// {"kind":"car","brand":"saab","wheels":"4","price":"1234","morestuff":"foobar"}

Answer 5

you could do it with match in one shot, and get an array back.

below lines were tested in chrome console:

str = "car[brand=saab][wheels=4]";
"car[brand=saab][wheels=4]"
str.match(/[^=[\]]+(?=[[\]])/g)
["car", "saab", "4"]

Answer 6

function getObject(str) {

    var props = str.split(/\[(.*?)\]/g),
        object = {};
    if (props.length) {
        object.name = props.shift();
        while (props.length) {
            var prop = props.shift().split("=");
            if(prop.length == 2){
                object[prop[0]] = prop[1];
            }
        }
    }
    return object;
}

console.log(getObject("car[brand=saab][wheels=4]"));