Posts

  • Endless Command Execution

    I happen to find myself regularly in the situation of writing a throw away BASH script. Often, I need to run the script several times before I have it implemented correctly. This is the typical edit-(compile-)run cycle most programmers know. The trial-and-error workflow must be of course as fast as possible. I am already using tmux so switching between the editor and the console where the script runs is pretty fast. Still, I need to switch to that window, recall the previous command and execute it again. The appropriate tmux/shell key sequence would be <tmux-prefix>4<CAPSLOCK>k<ENTER>. Let’s examine this in detail

    <tmux-prefix>4 	Jump to the window (in this case window #4) where the script is run.
    <CAPSLOCK>	Enter Normal mode in Zsh. I am using vi-mode in the shell and have mapped CAPSLOCK to ESC
    k		Scroll up to the previous command. This is the previously executed script, of course.
    <ENTER>		Execute the command.
    
  • Some Grep Tips

    In this post, I am going to present some simple tips when using grep.

  • How To Link A C Library In Haskell

    In this blog post, I am going to show you how to link a C library in Haskell. Each step is kept as simple as possible in order to focus on the overall goal.

  • Simple MySQL Data Migration

    I find myself more often than I think needing to shuffle around MySQL data. Usually this is about dumping one table to another database. For example, I sometimes want to get some production data into a test or development database to reproduce an issue. On my local box I often need to recreate an existing database structure for development purposes.

  • Test Deployments With Git Tags

    Deploying an app to production typically happens using some tool like Jenkins. The deployment job usually takes the Git tag as input parameter. The parameter is used to checkout the expected version of the app, build & deploy it.

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