// This is the reference implementation for xml2js.  It's 3-4x slower.
function xml2js(node) {
    if (node instanceof Array)
        return node.map(xml2js);
    if (node.nodeType == 3)
        return node.nodeValue;
    if (node.nodeType != 1)
        return undefined;
    var childElements = node.childNodes.select(
        function(c){return c.nodeType==1});
    if (childElements.length) {
        var obj = {};
        childElements.forEach(function(child) {
            var o = xml2js(child);
            var v = obj[child.nodeName];
            if (v) {
                if (v instanceof Array)
                    v.push(o);
                else
                    v = [v, o];
                o = v;
            }
            obj[child.nodeName] = o;
        });
        return obj;
    } else
        return node.childNodes.map(
            function(c) {return c.nodeType==3 ? c.nodeValue : ""}).join('');
}


// function f1(a,b) {return [a,b]}
// var f2 = f1.bind(null,1);
// info(f2(2));

function f3(a) {return a+1}
function f4(a) {return a*2};
info(f3.compose(f4)(1));
info(f4.compose(f3)(1));