send とか getattr とかを js でしてみる

send.js

function getattr(self, attrname) {
    return (function() {
        return eval("this." + attrname);
    }).apply(self, arguments);
}
function send(self, funcname) {
    return (function() {
        return eval("this." + funcname + "(arguments);");
    }).apply(self, arguments);
}
function test() {
    alert(getattr([1, 2, 3], "length"));
    alert(send([1, 2, 3], "push", 4));
}