Utility Functions: Geometry Functions
- March 24, 2010 10:16 PM
- Utility Function, ColdFusion
- Comments (0)
Today we've got a double header of functions dealing with Geometry. As I said in my last post, I've been spurred into action by a user's question, and in order to solve his problem, I'm going to need to be able to calculate some relatively simple geometry. Click "more" to see how to convert Degrees to Radians and how to calculate the position of a point based on a starting location, angle, and distance.
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I ran into an interesting situation this morning that didn't have an obvious answer. I needed to create a zip with a few specific files out of a directory with lots of possible files. The problem is that <cfzip /> is designed to work against whole directories, so at first I kept thinking that I'd have to make a temporary directory, move the files to it, and then zip the directory, but a little more persistence found the right answer.
One technique I often use is to create gateway objects to my database that allow the user to pass in multiple IDs, rather then a single one. I've run into a problem though; what if the user passes through something that is a valid list, but is not a valid list of the type I need? Read more to see ListIsValid() abd ListRemoveInvalid().
