Category Archives: data structures

From time to time it happens that a bug is accidentally introduced and we realize it several versions later. If the cause of the bug is not clear, one good strategy is to find the piece of code change that introduced the bug, and engineer a test and fix from that change. If we haveContinue reading “Bisecting Pharo versions to find regressions”

This is a brief post on how to load the sound package, enable it and play some sound samples in Pharo 9.0. For Pharo 9.0, we fixed the sound support by refactoring and using SDL2 for enqueuing the playback of sound samples. The current version only supports sound playback, but it does not support yetContinue reading “How to play Sound in Pharo”

This is the fourth entry of the series about implementing full-text search indexes in Pharo. All started with the first entry Implementing Indexes – A Simple Index, where we present the need for having indexes in large images. Then, we have the second entry is Implementing Indexes – Who uses all my memory, where we analysed theContinue reading “Implementing Indexes – Replacing the Dictionary”

This is the third entry of the series about implementing full-text search indexes in Pharo. The second entry is Implementing Indexes – Who uses all my memory, where we analysed the first version and the problems it has. You can start reading from this post, but there are things that we have presented in the previousContinue reading “Implementing Indexes – Compressing the Trie”

In this blog post, I will discuss why using Transcript can be really badly used. I will present that with some simple care we can develop modular solutions that are flexible and can take advantages of using Transcript without the inconvenients.  As a general remark, if you want to log better use a real systemContinue reading “Transcript: the misunderstood global”

This blog post is a first and short of a series where we will explore block-closures. This post will cover basic elements while the other will start to go over more semantical aspects using simple examples. This blog post is extracted from “Deep Into Pharo” and a new book under writing that will revisit chosenContinue reading “About Blocks: Basics 101”