Tag Archives: programming

Debugging With gdb

Posted on 2016-05-08 by jimbelton

If you need to debug a C or C++ program on Linux, I’d normally recommend using ddd, or some other graphical source code debugger. But if you are debugging remotely (over ssh for example), it’s worth knowing the basics of … Continue reading →

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Installing Kivy on Debian Mint

Posted on 2016-04-03 by jimbelton

Kivy is a free development environment for building portable python apps for iOS and android, supporting Linux, Windows, and OSX. Installation Here’s how I installed it: Ran: sudo add-apt-repository ppa:kivy-team/kivy Ran: sudo apt-get update Ran: sudo apt-get install python-kivy When … Continue reading →

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Wikidata Class Hierarchy

Posted on 2016-03-04 by jimbelton

The latest update to the wd-extract.py program in my wikidata project (see https://github.com/jimbelton/wikidata for the code) includes the ability to extract the class hierarchy from a wikidata dump file. I’ve also added a new program, wd-diagram.py, that can render the … Continue reading →

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Wikidata Extraction Tool on GitHub

Posted on 2016-02-26 by jimbelton

I just pushed the first bit of a tool for extracting information from wikidata.org. See my previous article for a description of the dump format. The tool can be found here: https://github.com/jimbelton/wikidata It doesn’t do a lot so far, but … Continue reading →

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Hash Table Shootout Updated

Posted on 2015-11-27 by jimbelton

I spent today working on the Hash Table Shootout project. Check out the updated version on git hub: https://github.com/jimbelton/hash-table-shootout. I added a new fast benchmark that counts the number of unique words in the King James version of the bible … Continue reading →

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How To Use Heroku

Posted on 2015-11-07 by jimbelton

Heroku is a cloud based development platform, part of Salesforce, that allows you deploy web based applications in the cloud. I’ve been playing with it to see what it can do. To create a new Heroku app named app-name in … Continue reading →

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Python virtualenv How To

Posted on 2015-11-07 by jimbelton

To install the virtualenv command, run: pip install virtualenv If that fails and you have root priviledges, run: sudo pip install virtualenv To create a python virtualenv called venv, run: virtualenv venv To activate that environment, run: source venv/bin/activate You … Continue reading →

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CLZ – The Integer Log Base 2 Instruction

Posted on 2015-07-30 by jimbelton

In just a few CPU instructions, the truncated base 2 logarithm of any integer can be computed for any integer from -2^63 … 2^63 – 1. This has interesting applications in being able to rapidly access logarithmically increasing arrays. The … Continue reading →

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Baker Proof of Concept on GitHub

Posted on 2015-07-22 by jimbelton

The first proof of concept of my latest hack project is available on GitHub: https://github.com/jimbelton/baker This program (written in python) is able to automatically build a simple C library and its test program. The tool requires little to no configuration … Continue reading →

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Hash Table Shootout on GitHub

Posted on 2015-07-01 by jimbelton

NOTE: Since I wrote this article, I fixed some bugs in the benchmarks and regenerated the graphs. The updated article is here: Hash Table Shootout Updated I forked Nick Welch’s hash table shootout benchmark, got it all working, and updated … Continue reading →

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