The goal of the loader pattern is to provide a way to embed an unknown number of remote scripts into a site without having to update the site. The updates can be done on the remote CDN and will update all sites. The Loader Pattern constructs a URL with date and time stamp at the end...
When you know that a certain condition will not change throughout the life of the program, it makes sense to test the condition only once. Browser sniffing (or feature detection) is a typical example. //BEFOREvarutils ={ addListener :function(el, type, fn) {if(typeofwindow.addEventListener...
the course moves to valuable intermediate and advanced concepts like Dom manipulation, function constructors, prototypal inheritance, first-class functions, closures, module pattern for data privacy etc. It covers modern Javascript including ES6, ES7, ES8 and ES9. There are several coding sessions, ...
//antipattern//for demo purposes onlyvaradd =newFunction('a, b', 'return a + b'); add(1, 2);//returns 3 Any variable defined withvarinside of a function is a local variable, invisible outside the function. Saying that curly braces don’t provide local scope means that if you defi...
(in JS some people mean Chapter 5. module pattern by singletons) you might want singletons when using new: store instance as a (static) property on constructor function but static property is public can also protect instance as a private static member (via closure) (be careful not to wip...
The objects participating in this pattern are: Client -- In example code: the run() program. builds (or is given) a syntax tree representing the grammar establishes the initial context invokes the interpret operations Context -- In example code: Context contains state information to the int...
For those that are familiar with object-oriented languages, modules are JavaScript “classes”. One of the many advantages of classes isencapsulation- protecting states and behaviors from being accessed from other classes. The module pattern allows for public and private (plus the lesser-know protect...
A proto-pattern is a pattern-to-beifit passes a certain period of testing by various developers and scenarios where the pattern proves to be useful and gives correct results. There is quite a large amount of work and documentation—most of which is outside the scope of this article—to be...
{classProgram { static voidMain(string[]args){stringinput ="Hello World ";stringpattern ="\\s+";stringreplacement =" "; Regex rgx =newRegex(pattern);stringresult = rgx.Replace(input,replacement); Console.WriteLine("Original String: {0}",input); ...
/* A type variant being pattern matched */ let possiblyNullValue1 = None; let possiblyNullValue2 = Some "Hello@"; switch possiblyNullValue2 { | None => print_endline "Nothing to see here." | Some message => print_endline message ...