Sylwester Wojnowski
Web Developer
Helping make the web work for everyone. Welcome to my website. My name is Sylwester Wojnowski and I help individuals and organisations achieve presence on the web.
16 Jul 2020 14:51:53
Learn how to check whether two trees are the same using a recursive algorithm or the spaceship operator in PHP.
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21 Dec 2016 11:07:56
List of Unicode code points for Genericons vector icon set and a BASH script that finds the codes.
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29 Jun 2018 19:38:09
Encrypting files and directories of files with public key and ciphers using GnuPG and gpg-zip.
29 Apr 2017 16:41:28
Sorting UTF-8 encoded strings using strcoll and usort functions or alternatively Collator library in PHP.
14 Jul 2020 11:08:06
An article on recursively updating deeply nested arrays using array_walk_recursive and custom nested array traversal function in PHP.
27 Apr 2018 14:14:09
An article on Mister Spy Bot website hack and how to defend against it.
03 Jul 2017 13:58:12
Article on traversing tree data structure depth-first in pre-order recursively with examples in PHP programming language.
18 Jul 2020 00:39:07
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 ...
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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 ...
15 Jul 2020 11:21:05
In this article I look at two very useful mathematical formulas related to dealing with percentages efficiently. You might know them, but it is likely, you haven't not been shown at least one of them while studying the subject during your school years. I remember my own ...
Suppose you have a deeply nested array of items, with its members being numbers and arrays. You want to update all the numbers, like 3 and 5 for example, in all of the arrays, no matter how deep nested the numbers are in the structure. In this article I look at two methods of ...
