interview-02.js

// inherit.js
var inherit = function(parent, child) {
    var _ = function() {};
    _.prototype = parent.prototype;

    child.prototype = new _();
    child.prototype.constructor = child;
};

// inherit-es5.js 
var inherit = function(parent, child) {
    child.prototype = Object.create(parent.prototype);
};

// bind.js
Function.prototype.bind = function(context) {
    var fn = this,
        args = [].slice.call(arguments, 1);

    return function() {
        return fn.apply(context, [].concat.apply(args, arguments));
    };
};