Posted By

ultranaut on 10/24/11

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javascript
replace

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Last Edited at 10/24/11 05:48am

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Search and don\'t replace

/ Published in: JavaScript

two awesome bits: using ''.replace() perform an action (other than replacing it) on some text, and a simple way to concatenate strings with a separator (retardedly simple but it always confuses me)

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var q = 'foo=1&blah=a&foo=2&foo=3&blah=b'
 
function compress(data){
    var q = {}, ret = '';
    data.replace(/([^=&]+)=([^&]*)/g, function(m, key, value){
        q[key] = (q[key] ? q[key] + ',' : '') + value;
    });
    for ( var key in q )
        ret = (ret ? ret + '&' : '') + key + '=' + q[key];
    return ret;
}
 
console.log(compress(q))