javascript design patterns pdf

elements.The combined mode allows you to optimize the processing of recursive or hierarchical data structures. There are many examples of hierarchical data structures that make combinatorial patterns very useful. A universal example of hierarchical data structures is what you encounter every time you use a computer: the file system. The file system consists of directories and files. Each directory can be loaded with content. The contents of a directo

')); }; varaddcondiments=param.addcondiments| |function(){ Throw NewError (' must pass Addcondiments method ')); }; varf=function(){}; F.prototype.init=function() {boilwater (); Brew (); Pourincup (); Addcondiments (); }; returnF;};varCoffee=Beverage ({brew:function() {Console.log (' Brew coffee with boiling water '); }, Pourincup:function() {Console.log (' Pour the coffee into the cup '); }, Addcondiments:function() {Console.log (' Add sugar and milk '); } }

when we need it. The lazy Singleton is the focus of the singleton pattern.Example: In this example, we put the responsibility of creating the instance object and the responsibility of the management object separately in two methods, the two methods can change independently and do not affect each other, when they are linked together, to complete the creation of a unique power object function, it seems to be a very wonderful thing.1 //managing logic code for a single case2 varGetsingle =function(

The module mode is a block of code that provides public and private methods, facilitates encapsulation of organization code, and reduces the conflict between variables and function names against other modules.Recommended reading:Http://www.adequatelygood.com/JavaScript-Module-Pattern-In-Depth.htmlhttp://toddmotto.com/mastering-the-module-pattern/The module model is varied and I only list the module patterns

of an algorithm at one time, and leave the variable behavior to the subclass for implementation. Common behaviors in each subclass should be extracted and centralized into a common parent class to avoid code duplication. differences are separated into new operations. Finally, replace these different codes with the template method of A New phishing operation. Control subclass extension. The template method only calls the "Hook" operation at specific points, so that extension can be perform

setcss (IDs, styles) { forvar i = 0,len = ids.length; i ) { setstyles ( Ids[i], styles); Appearance patterns in JavaScript applications can be divided into two categories, a block of code repeated, such as the call of function a basically appear before the Call of function B, then consider the use of this code to wrap the appearance of the role to optimize the structure. Another is that some