A personal blog about Emacs and functional programming.

A picture of myself

Hello, I’m Sebastian Wiesner, software developer by occupation and passion.

These days my passion is Scala, and I’m incredibly happy that I can use Scala professionally and make a living from my passion. It’s a great time to live as a Scala programmer.

Before the beauty and elegance of functional programming was revealed to me, I was writing Python for almost a decade and made Windows applications with C# and WPF—which I still believe to be the best GUI framework in the world. Nowadays my language of choice—besides Scala—is Haskell, but I’ve also done a bit of OCaml, and occasionally take a curious look at Rust.

My other passion is Emacs, the world’s best editor. I maintain Flycheck, a popular Emacs package for automatic syntax checking.

You can find my open source work on Github, read my answers on Stack Overflow and follow me on Twitter.

My GPG key has the ID 5C42FE98 and the fingerprint 5C72 C0D3 CC58 04FF 522E 4815 C4EC 41E3 5C42 FE98. You can get it from GPG keyservers or download it. I use this key to sign my commits on Github.


I write infrequently, mostly about Emacs and functional programming. These are my latest posts (Atom feed):

  1. April 28, 2016 Apr 28, 16 Show Magit Status window in fullscreen

    Show Magit’s status buffer fullscreen with display-buffer-alist.

    Read more…

  2. January 26, 2016 Jan 26, 16 Not Spacemacs!

    I used to think that Spacemacs was awesome but the project has since taken a turn where I can’t follow it.

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  3. December 23, 2015 Dec 23, 15 Emacs Spotlight: Typographic Editing Modes

    In this post I’ll introduce you to two modes that bring some typographic editing features to Emacs: Typo Mode and Tildify Mode. These modes help you use typographic quotes, punctuation and spaces.

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  4. November 29, 2015 Nov 29, 15 Reproduce bugs in emacs -Q

    Please reproduce this issue in emacs -Q.

    This is a sentence you will often read when you report bugs in Emacs packages; it’s usually a quick reply from a developer and goes with no further explanation or even the slightest clue on what you’re actually supposed to do. If you ever found yourself in that situation then this post is for you: I’ll explain what it means to “reproduce a bug in emacs -Q”, how to do that properly, and why developers ask you for this.

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  5. August 16, 2015 Aug 16, 15 Emacs Spotlight: Emojis in Emacs

    I’ve recently found the best Emacs package ever: company-emoji. It’s a Company source for Emoji input 😍.

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  6. April 29, 2015 Apr 29, 15 Emacs Spotlight: Configure buffer display

    I guess every Emacs user knows this particular phenomenon: Windows constantly pop up at almost, but not quite, entirely undesired places. It is a surprisingly hard challenge to make Emacs display buffers in a sane way. Packages like winner and pop-win tell stories about the pain of generations of Emacs users. Well, it used to be a hard, but now it became much easier in Emacs 24.1 with the new display-buffer-alist option.

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  7. January 20, 2015 Jan 20, 15 Why package.el?

    Today, an Emacs user on Reddit asked how to organise their Emacs extensions, specifically whether to use package.el or a “home-made” solution. This post answers that question. It’s essentially a copy of a Reddit comment of mine from about a year ago.

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  8. January 6, 2015 Jan 06, 15 My Emacs Configuration with use-package

    In the past I used to keep my Emacs configuration completely in a single init.el file. For a long time this worked quite well, but of late my configuration became increasingly messy: Package configuration was mixed with utility functions, key bindings, and even larger code for entirely new features. Needless to say that my init file was in dire need of a very thorough cleanup.

    I had heard a lot of good things about John Wiegley’s use-package macro, and in the days after Christmas I decided to sit down and try to refactor my Emacs configuration with use-package. The result was very pleasant, and much better than I had dared to hope.

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  9. December 23, 2014 Dec 23, 14 My Christmas present for fellow Emacs users: Flycheck 0.22

    With Christmas almost here, it’s time for me to present my gift to you, my fellow Emacs users: A brand new shiny release of Flycheck, now at version 0.22. At the surface little has changed, but under the hood Flycheck made a big step towards a 1.0 release, and provides even more features to write your own syntax checkers.

    The release announcement and the changelog have all the details, but in this post I’d like to give you a short idea of what I think are the most important features of this new release.

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  10. December 23, 2014 Dec 23, 14 Emacs Spotlight: Bug Reference Mode

    There’s not a day in which I don’t find a new gem for Emacs. Today it’s the built-in bug-reference-mode. This fancy little thing turns issue references in text into clickable buttons that browse the corresponding issue in a bug tracker. I discovered it via the bug-reference-github package, which automatically configures the mode for files in Github repositories.

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