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linux: kill background task
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Very useful symbols, these %1 and %% - especially. Some things don't die on Ctrl-C, so you need to Ctrl-Z them, and then kill -9 %%. One example where I found it useful is: while true; do mplayer <some unstable online radio>; date >> restarts.log; done - Ctr...
Circle-Rectangle collision detection (intersection)
... the circle.
Note that this does not require the rectangle to be axis-parallel.
(One way to see this: if none of the edges has a point in the circle (if all the edges are completely "outside" the circle), then the only way the circle can still intersect the polygon is if it lies completely ins...
Is it possible to append to innerHTML without destroying descendants' event listeners?
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Unfortunately, assignment to innerHTML causes the destruction of all child elements, even if you're trying to append. If you want to preserve child nodes (and their event handlers), you'll need to use DOM functions:
function start() {
var myspan = document.getElementById("myspan");
...
Aborting a stash pop in Git
... any merging done by the git stash apply.
The reverse merge requires that all current changes be pushed into the index:
git add -u
Then invert the merge-recursive that was done by git stash apply:
git merge-recursive stash@{0}: -- $(git write-tree) stash@{0}^1
Now you will be left with just...
Git repository broken after computer died
... managed to recover through:
rm .git/refs/remotes/origin/HEAD
git fetch --all
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Array or List in Java. Which is faster?
I have to keep thousands of strings in memory to be accessed serially in Java. Should I store them in an array or should I use some kind of List ?
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How do I make a simple makefile for gcc on Linux?
...ple as possible by omitting variables like $(CC) and $(CFLAGS) that are usually seen in makefiles. If you're interested in figuring that out, I hope I've given you a good start on that.
Here's the Makefile I like to use for C source. Feel free to use it:
TARGET = prog
LIBS = -lm
CC = gcc
CFLAGS ...
Professional jQuery based Combobox control? [closed]
...ately, the best thing I have seen is the jquery.combobox, but it doesn't really look like something I'd really want to use in my web applications. I think there are some usability issues with this control, but as a user I don't think I'd know to start typing for the dropdownlist to turn into a textb...
Simple Vim commands you wish you'd known earlier [closed]
I'm learning new commands in Vim all the time, but I'm sure everyone learns something new once in a while. I just recently learned about this:
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Difference between \n and \r?
...e 10 and 13 respectively;-).
But seriously, there are many:
in Unix and all Unix-like systems, \n is the code for end-of-line, \r means nothing special
as a consequence, in C and most languages that somehow copy it (even remotely), \n is the standard escape sequence for end of line (translated to...