javascript : get array from url querystring
/*
* Returns a map of querystring parameters
*
* Keys of type <fieldName>[] will automatically be added to an array
*
*/
function getParams(url) {
var regex = /([^=&?]+)=([^&#]*)/g, params = {}, parts, key, value;
while((parts = regex.exec(url)) != null) {
key = parts[1], value = parts[2];
var isArray = /\[\]$/.test(key);
if(isArray) {
params[key] = params[key] || [];
params[key].push(value);
}
else {
params[key] = value;
}
}
return params;
}
url = 'http://www.somewhere.com/index.html?field[]=history&field[]=science&field[]=math';
getParams(url);