Bookmarklet to de-cache CSS and images – Version 2
You may recall, in this previous post I showed you how to use a bookmarklet (typically a small piece of JavaScript you can save as a bookmark and run against a page) to get the latest versions of CSS...
View ArticleCentre div in window, in iFrame, from iFrame, without an iFrame ID
Update: This code has been replaced. Centring a div is not so hard. Centring a div on a window regardless of the windows scroll position is a little harder. Centring a div in the viewport in an iFrame...
View ArticleSix Ways to Iterate Through an Array (or Chrome’s V8 is a Monster)
There are actually all kinds of ways to iterate through an array in JavaScript. Here, I will concentrate on six of them, describe their advantages, and do performance testing to actually prove which of...
View ArticleChecking if an implied object is empty
An implied JavaScript object (e.g. var o = {};) will always be a truthy value. Since we have no index or length, there is no graceful way to check whether or not these variables have been populated....
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Using previously highlighted text in TextMate snippets
In a previous (and very verbose) post on TextMate snippets, I showed a snippet to easily and simply use a tab trigger to insert a try... catch statement. If you missed it feel free to catch up here....
View ArticleChecking for Duplicates in a JavaScript Array
JavaScript has an in operator, that allows us to look through an object to see if we can find a property. If we create an object containing particular items in an array, we can then look through those...
View ArticleCentre div in window no matter what – Version 2
In a previous post I showed you how to center a div on screen regardless of if it was inside an iframe or not. This is the second version, which should work regardless of if the div is in the top level...
View ArticleRegular Expression to match UK residential telephone numbers
A regular expression to match UK residential telephone numbers. It understands the difference between 02 and 01 numbers. It will accept all common formats and internationally formatted numbers....
View ArticleDestructuring assignments in JavaScript 1.7
Destructuring assignments are great for time saving methods of assigning values to variables. They make for shorter code, and shorter code is less error prone. A destructuring assignment essentially...
View ArticleDefensive AJAX and AJAX retries in jQuery
A lot of code that I have seen over the years always assumes success, particularly with AJAX calls. This creates code that is fragile, and entirely dependant on the result of external (to the client)...
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