ThreeHammers1_ImperativeSolution

function objectizeUrlSearch (paramString) {
    var
    pairStrings = paramString.split('&'),
    pairs = [],
    result = {},
    i;

    for (i = 0; i < pairStrings.length; i++) {
        pairs.push(pairStrings[i].split('='));
    }
    for (i = 0; i < pairs.length; i++) {
        var pair = pairs[i];

        if (result[key(pair)]) {
            result[key(pair)] = []
                .concat(result[key(pair)])
                .concat(value(pair));
        } else {
            result[key(pair)] = value(pair);
        }
    }
    return result;
}