variables

The European VISTA telescope has spotted two previously undetected clusters of ancient stars. These objects, called globular clusters, were found in new images from VISTA that were part of the Vista Variables in the Via Lactea survey.

Python Tutorials for Kids 8+: "You might, justifiably, be thinking – why didn't we just use two variables called currentImage and totalImages?

This tutorial is going to try to explain that."

Linux Admin Zone: "This is a basic PHP script to check replication status of single or multiple MySQL servers.

You have to update variables in the script to run in browser like user, password, ip of server etc."

Bashshell: "You may need to export variables in some circumstances in order to use them in the child process. The export command places the variable in the environment."

ServerWatch: "One thing Perl does really well is read in information from a file. There are a couple of useful special variables you can use to neaten up your code when doing this or to alter the default behavior when reading in records."

The NetBeans team (Sun) has recently announced namspace support or PHP development in their IDE. They've also just posted a screencast showing how this new functionality works.

Continuing on in his refactoring series (part 1 & part 2) Sameer has posted part three - a method of replacing temporary variables with calls to other methods.

Alex on Linux: "Lets say we have a data structure that manages objects and we would like to manipulate the data structure and the objects from two or more threads.

To achieve maximum performance we have to distinguish between mechanism that we use to protect the data structure itself, and the mechanism that we use to protect actual objects."

As a follow up to the previous post, check out how Chung-chieh Shan applied regions to a seemingly unrelated problem. His post begins by explaining how automatic (numerical) partial differentiation can be implemented, and goes on to show how to use regions to avoid mixing-up the variables being differentiated.