a tumblelog
week 38, 2019

Learn to change history with git rebase!

One of Git's core value-adds is the ability to edit history. Unlike version control systems that treat the history as a sacred record, in git we can change history to suit our needs. This gives us a lot of powerful tools and allows us to curate a good commit history in the same way we use refactoring to uphold good software design practices. These tools can be a little bit intimidating to the novice or even intermediate git user, but this guide will help to demystify the powerful git-rebase.

Source: Learn to change history with git rebase!.

On undoing, fixing, or removing commits in git

This document is an attempt to be a fairly comprehensive guide to recovering from what you did not mean to do when using git. It isn't that git is so complicated that you need a large document to take care of your particular problem, it is more that the set of things that you might have done is so large that different techniques are needed depending on exactly what you have done and what you want to have happen.

Source: Git Fix Um — On undoing, fixing, or removing commits in git.

Red Cat on the Bridge

On my way back to my mother's house I encountered a red cat walking on the stone wall of a bridge. I could only take one photo because it was quite restless but loved to be petted.

Close-up of a red cat on a bridge
Close-up of a red cat sitting on the stone wall of a bridge.

Soon it jumped off the wall and went into a nearby garden.

The Shy Calico Cat Returns

In the evening the shy calico cat returned. I fed it a thin slice of sausage and took a few photos.

Feeding the shy calico cat
Feeding the shy calico cat a thin slice of sausage.

Wasps: If you can't love them, at least admire them

No, wasps have very useful functions, one of which is to keep other insects in check. Every insect you can think of probably has some wasp that will attack it. If that wasn't the case, we'd almost certainly be using more pesticides than we already do on our farms.

Source: Wasps: If you can't love them, at least admire them - BBC News, an article by Jonathan Amos.

10 Rules Of Photography To Know And Break

Knowing when to apply the rules of photography and when to break them is essential to making great images. There are times when the rules will serve you well. Follow then too closely and your work will become predictable, rigid and dead.

Source: 10 Rules Of Photography To Know And Break.

Version 2.0.1 of tumblelog has been released

It turned out that version 2.0.0 of tumblelog has a small bug: if you use an older version of the CommonMark Perl module the constant OPT_UNSAFE is not defined. So I added some code that checks if this constant exists and if not adds it.

Get version 2.0.1.

The Watchmaker's Daughter

In the evening I started to read in The Watchmaker's Daughter, Glass and Steele Book 1 by C.J. Archer.

Version 2.0.0 of tumblelog has been released

In the evening I pushed version 2.0.0 of tumblelog to GitHub. This version renders text after an image as a caption. Or, the following Markdown:

Photo of a cat resting.

Is rendered as HTML as follows:

<img alt="Cat" src="cat.jpg" />
Photo of a cat resting.

This allows for styling using CSS of both the image and the caption. You can see examples on this blog.

Why Go and not Rust?

Imagine you’re a developer who mainly works with Go. You go to an event and, while chatting with some people, you decide to share with them the news that you wrote a small tool that does something. You claim that since you wrote it in Go, it’s fairly fast, it’s a single binary, etc. The group seems pleased with your recount and you start feeling good, but then you notice a stranger approaching from behind. A bone-chilling wind blows and you hear: “Why Go and not Rust?”

Source: Why Go and not Rust?, an article by Loris Cro.

Dataframe Visualization with Pandas Plot

In this post I will show you how to effectively use the pandas plot function and build plots and graphs with just one liners and will explore all the features and parameters of this function. I would be using the World Happiness index data of 2019.

Source: Dataframe Visualization with Pandas Plot.

CommonMark memory corruption "fixed"

In the evening I finally had a working HTML renderer with node rewriting for the upcoming version 2.0.0 of tumblelog. Read about the memory corruption issue and a work around thanks to Nick Wellnhofer in Rewriting CommonMark Nodes in Perl "right" this time.