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Posts Tagged ‘var’
Limiting Variable Scope Using (function(){})();
In: web resources
14 Dec 2009Simply put, a scope limiter is a self-executing function that defines a variables, performs a task, and clears those variables so that their scope is limited to the function itself. Take the following javascript code, for example: /* do task 1: */ var lynx = $$(‘a’); var divs = $$(‘div’); //(do stuff with links and [...]
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- Tags: david walsh, David Walsh Blog, Don, function, javascript code, limiters, scope, task, twitter, var, variable scope
Javascript Closures: Keeping Variable Scope
In: web resources
14 Dec 2009A lot of you have probably heard the term “closures” within the context of programming but aren’t sure what they are. Wikipedia defines a closure as: …a first-class function with free variables that are bound in the lexical environment. Such a function is said to be “closed over” its free variables. A closure is defined [...]
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- Tags: David Walsh Blog, Don, free variables, function, JavaScript, javascript code, lynx, task, twitter, var, Wikipedia
Access Javascript Object Variable Properties
In: web resources
25 Nov 2009Not all javascript objects are as easy as MyObject.property. Sometimes you may want to access a property whose key is stored in a variable. Luckily accessing these properties is very easy. Javascript Object Property Accessing Example /* setting */ var myObject = { left : 30, top: 20 }; /* basic access */ var left [...]
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