In this article, more out of curiosity than for a good reason, I look at one way of how e-mail spam gets sent by hacked PHP CGI setups. The scenario goes like this: a carefully crafted URL changes PHP configuration to enable a remote file inclusion into a script executed by a ...

JavaScript arrow functions are cool addition to the language. You no longer think about a good name for your function, are allowed to skip "function" keyword, and sometimes even drop parameter's enclosing parentheses. In this article I look at whether these ...

One useful skill when it comes to dealing with variables is to be able to change their range. One of the most useful and desirable ranges is [0,1]. Occasionally you might need a different range like [-1,1], too. This article describes a couple of methods of scaling and descaling ...

At some point in your adventure with programming you are likely to find yourself in need of determining whether two trees are the same or not. This article describes two methods to do it. First on them relies on a recursive algorithm, the other, shorter, simpler and more ...