Many times I find myself writing code which involves finding a random number in a given range. Often times that number needs to be an integer. Since this is such a common task, I figured I would share a brief snippet of code with you all: The above function can Read more…
A few months ago I wrote a blog post about extensions to the Date.prototype. That post provided ways to add date parts and subtract date parts. Today’s post shows you how to use a generic Date.prototype.diff() function to find the difference between two dates and optionally return a string specifying Read more…
Recently, the IT department was under a bit of pressure to to eliminate a Trojan Virus which was replacing folders with applications that had folder icons and hiding the folders in such a way that they couldn’t be hidden by just going to the properties dialog box. Fortunately, one member Read more…
At times, integrating other technologies can be a very strenuous task. Yesterday I was trying to figure out a way to redirect to a page using POST variables and not GET variables. After scouring the web for a PHP solution, I decided to approach things differently and use JavaScript to Read more…
A while back I wrote this post about having classes with prototype functions that have access to private variables. To clarify this discussion, I have created this slideshow which briefly outlines how to accomplish writing JavaScript classes with private members which are accessible by prototype functions. In addition, the following Read more…
Two very simple operations that you may have to deal with if writing a JavaScript that deals with trigonometry are Math.degrees() and Math.radians(). These function can be easily defined as follows: The name of these functions indicates the end result. Using the above definitions, you could run code such as Read more…
One of the things that bothers me about the native rounding functions is the fact that there is no way to specify precision. If this is something that you need to do you can use the following code to define Math.$round(...), Math.$ceil(...), and Math.$floor(...): This code Makes the following functions Read more…
Recently someone tested my knowledge of JavaScript and asked me what types of native data structures exist which can contain an arbitrary amount of data. My answer was that Arrays and Objects can both do this right out of the box. He said that I was mostly correct, but that Read more…
One of the things that you often have to learn early on in school after multiplication and division is how to find the GCD (Greatest Common Divisor) of two numbers. It is possible that you know the GCD as the GCF (Greatest Common Factor) or the HCF (Higest Common Factor). Read more…
One of the first things that many people learn in an introduction to Computer Sciences course is the algorithm for calculating the square root of a number. The algorithm, which is often attributed to Heron of Alexandria, is as follows: Formulate a guess. Multiply that guess by itself. If the Read more…