Set, Stack, Queue and Array in Computer Science

In this small lecture Simon talks about Set, Stack, Queue and Array in Computer Science.

 

Simon says he made a mistake in the Addendum: you can add and remove elements to/from an array in PHP.

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PHP

Simon has yet a new craze: PHP. Here he explains what this language is about. This video is made yesterday, on the first day he started learning about PHP:

The same day outside, Simon explaining to me how to insert a PHP document in an HTML one:

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Variables in PHP are introduced using a dollar sign:

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Tonight Simon was crying very hard and I had to rock him on my lap to ease down the pain: he couldn’t find any tutorial or any other kind of explanation on the internet about how to make the web browser interpret his PHP file as a PHP file instead of literally displaying the file, like it does now (he used Sublime Text as his text editor):