I had an NSArray of objects (all the same). I needed a property out of all of those objects. So I created a Category on NSArray to add this functionality. It loops through each object and performs a selector creating a new array from the results. One important note is that since you can’t put
By virtue of PHP’s many Magic functions it is possible and indeed quite easy to create an object that can be used to call a function or object method now, but have it invoked later. The reason I wrote this function was for lazy loading of data. I had the id’s and information required to
Basic implementation of the Newton’s Method for narrowing in on a square root. NOTE: in Firefox the yield keyword doesn’t exist unless the script tag loading the function has a type of “text/javascript;version=1.7”. version must be 1.7 or higher.
About a year ago I needed a quick and easy AJAX library to just grab XML or JSON. At that time I was working heavily in Objective-C on the iPhone which uses a lot of delegation of functionality. I wanted to build something similar for my web application. In most browsers the XMLHttpRequest object is
The function fibonacci contains the keyword “yield” making the function a generator. When the function is called it returns an iterator. The first time the iterator’s next function is called the fibonacci function runs like normal until the yield keyword. Yield works just like return, returning the value specified. The next time “next” is called
While creating 10 <a> elements, each link pointing at a different id number. In that case, this example makes sense. However, the creation of the anonymous function block encloses a reference to the variable i but the value of i keeps changing as the for loop loops. That ends up yielding all 10 links linking