Function merge

purl.js:111–126

(parent, key, val)

    }

    function merge(parent, key, val) {
        if (~key.indexOf(']')) {
            var parts = key.split('[');
            parse(parts, parent, 'base', val);
        } else {
            if (!isint.test(key) && isArray(parent.base)) {
                var t = {};
                for (var k in parent.base) t[k] = parent.base[k];
                parent.base = t;
            }
            if (key !== '') {
                set(parent.base, key, val);
            }
        }
        return parent;
    }

    function parseString(str) {
        return reduce(String(str).split(/&|;/), function(ret, pair) {