Recent Changes

2016-05-30

• 06:19 UTC (new) (history) 2016-05-30 Jeżycjada mistyczna – wprowadzenie . . . . Marcin Borkowski – Od ponad dziesięciu lat jestem wiernym fanem pisarstwa pani Musierowicz. Być może jest to dziwne, że facet w średnim wieku czyta sobie powieści dla nastolatek; być może nawet rodzi to określone podejrzenia. Nie zamierzam się jednak z tego tłumaczyć, tym bardziej, że czytując powieści pani M. znajduję się w doborowym, i to nie tylko damskim towarzystwie. Za to dla ewentualnych wątpiących mam kilka argumentów, które być może skłonią kogoś do sięgnięcia po Jeżycjadę.

2016-05-23

• 12:33 UTC (diff) (history) Comments on 2016-05-23 Literal values and destructive functions . . . . erez – Just to clarify, the warning is not about not using, it's about using. The advice is not to use them, have I understood correctly?
• 05:02 UTC (new) (history) 2016-05-23 Literal values and destructive functions . . . . Marcin Borkowski – In Lisp literature you can often find a warning about not using destructive functions (like sort or nconc) on values coming from literals. This is a good advice, and you should follow it. Here’s a short stab at a (partial) explanation (note that all examples are in Emacs Lisp).

2016-05-17

• 17:49 UTC (new) (history) 2016-05-17 Emacs Lisp closures demystified . . . . Marcin Borkowski – It is often claimed that one of the advantages of closures (as in “lexical scoping”) is information hiding (a.k.a. encapsulation). This is true, but as this post shows, you can’t really hide anything in Emacs Lisp;-).

2016-05-15

• 04:40 UTC (new) (history) 2016-05-15 debug-on-whatever . . . . Marcin Borkowski – Debugging Elisp is sometimes tricky. Some time ago I had an issue with a variant of show-paren-mode. The issue looked like a complete hang of Emacs, when even C-g didn’t help. How to debug that?

2016-05-12

• 05:39 UTC (new) (history) 2016-05-12 Make yourself known – summary . . . . Marcin Borkowski – So it’s over. I thought that a nice way of finishing the series of posts related to the contest would be some information about my work during the past two and a half months. So, let’s begin.

2016-05-10

• 04:30 UTC (new) (history) 2016-05-10 Preserving the drawing during screen rotation . . . . Marcin Borkowski – A rather annoying “feature” of Android is the fact that screen rotation causes recreating the current activity from scratch. While this is quite reasonable, it has an undesired side effect: most data are lost. (What is left is the state of widgets having an id.) In Logeox, this is not what I would like to have: if I rotate my phone (and that might happen by accident!), all my drawings are erased. The problem is: what do I do with it? Quite surprisingly, the solution seems far from obvious. After about an hour of reading and experiments, here’s what I learned and did.

2016-05-04

• 06:09 UTC (new) (history) 2016-05-04 UI considerations again – undo . . . . Marcin Borkowski – As you might have guessed, I pay siginificant attention to UI/UX issues. Since I’ve been implementing undo functionality recently, I thought I’d share a fwe thoughts about it. On the surface, undo seems easy: you record all changes you have made and revert the last one on demand. When you look at details, however, things can get messy.

2016-05-03

• 03:31 UTC (new) (history) 2016-05-03 All clear . . . . Marcin Borkowski – Well, the title of this post does not mean (unfortunately) that I’ve overcome all my design/coding problems (not to mention my life problems…) – it’s just a lame pun relating to the “clear the screen” feature.

2016-05-02

• 07:25 UTC (new) (history) 2016-05-02 Storing commands again . . . . Marcin Borkowski – Two posts ago I wrote about my struggle with the TurtleCommand class. Well, it seems the struggle is over. I’m now in the process of implementing commands, and so far it seems to work fine.

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