utils.js

/**
 * Created by guntars on 10/10/2014.
 */
define(function () {
    function extend(obj) {
        var type = typeof obj;
        if (!(type === 'function' || type === 'object' && !!obj)) {
            return obj;
        }
        var source, prop;
        for (var i = 1, length = arguments.length; i < length; i++) {
            source = arguments[i];
            for (prop in source) {
                obj[prop] = source[prop];
            }
        }
        return obj;
    };

    function fnExtend(protoProps, staticProps) {
        var parent = this;
        var child;
        if (protoProps && protoProps != null &&
            hasOwnProperty.call(protoProps, 'constructor')) {
            child = protoProps.constructor;
        } else {
            child = function () {
                return parent.apply(this, arguments);
            };
        }

        extend(child, parent, staticProps);

        var Surrogate = function () {
            this.constructor = child;
        };
        Surrogate.prototype = parent.prototype;
        child.prototype = new Surrogate;
        if (protoProps) {
            extend(child.prototype, protoProps);
        }

        child.__super__ = parent.prototype;
        return child;
    };

    function isString(obj) {
        return toString.call(obj) === '[object String]';

    }

    function isObject(obj) {
        return obj === Object(obj);
    }

    function isArray(obj) {
        return (Array.isArray) ? Array.isArray(obj) : toString.call(obj) === '[object Array]';
    }


    return {
        fnExtend: fnExtend,

        extend:   extend,

        isString: isString,

        isObject: isObject,

        isArray:  isArray
    };
});