util.js

doh.util = {
	hitch:function(/*Object*/thisObject, /*Function|String*/method /*, ...*/){
		var args = [];
		for(var x=2; x<arguments.length; x++){
			args.push(arguments[x]);
		}
		var fcn = ((typeof method == "string") ? thisObject[method] : method) || function(){};
		return function(){
			var ta = args.concat([]); // make a copy
			for(var x=0; x<arguments.length; x++){
				ta.push(arguments[x]);
			}
			return fcn.apply(thisObject, ta); // Function
		};
	},

	_mixin:function(/*Object*/ obj, /*Object*/ props){
		// summary:
		//		Adds all properties and methods of props to obj. This addition is
		//		"prototype extension safe", so that instances of objects will not
		//		pass along prototype defaults.
		var tobj = {};
		for(var x in props){
			// the "tobj" condition avoid copying properties in "props"
			// inherited from Object.prototype.  For example, if obj has a custom
			// toString() method, don't overwrite it with the toString() method
			// that props inherited from Object.protoype
			if(tobj[x] === undefined || tobj[x] != props[x]){
				obj[x] = props[x];
			}
		}
		// IE doesn't recognize custom toStrings in for..in
		if(	this["document"] 
			&& document.all
			&& (typeof props["toString"] == "function")
			&& (props["toString"] != obj["toString"])
			&& (props["toString"] != tobj["toString"])
		){
			obj.toString = props.toString;
		}
		return obj; // Object
	},

	mixin:function(/*Object*/obj, /*Object...*/props){
		// summary:	Adds all properties and methods of props to obj. 
		for(var i=1, l=arguments.length; i<l; i++){
			this._mixin(obj, arguments[i]);
		}
		return obj; // Object
	},

	extend:function(/*Object*/ constructor, /*Object...*/ props){
		// summary:
		//		Adds all properties and methods of props to constructor's
		//		prototype, making them available to all instances created with
		//		constructor.
		for(var i=1, l=arguments.length; i<l; i++){
			this._mixin(constructor.prototype, arguments[i]);
		}
		return constructor; // Object
	},
	
	isArray:function(it){
		return (it && it instanceof Array || typeof it == "array" || 
			(
				!!doh.util.global["dojo"] &&
				doh.util.global["dojo"]["NodeList"] !== undefined && 
				it instanceof doh.util.global["dojo"]["NodeList"]
			)
		);
	}
};

doh.util.global = this;