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What is the purpose of Rank2Types?
...howBox "foo"]
result :: [String]
result = map (runShowBox show) example
PS: for anybody reading this who's wondered how come ExistentialTypes in GHC uses forall, I believe the reason is because it's using this sort of technique behind the scenes.
...
Graph Algorithm To Find All Connections Between Two Arbitrary Vertices
...
Here is the pseudocode I came up with. This is not any particular pseudocode dialect, but should be simple enough to follow.
Anyone want to pick this apart.
[p] is a list of vertices representing the current path.
[x] is a list of pat...
How do I daemonize an arbitrary script in unix?
...cess running.
PID=$(cat $PIDFILE 2>/dev/null)
if [[ $? = 0 ]]; then
ps -p $PID >/dev/null 2>&1
if [[ $? = 0 ]]; then
echo "Command $1 already running."
exit
fi
fi
# Write our pid to file.
echo $$ >$PIDFILE
# Get command.
COMMAND=$1
shift
# Run command u...
Fast and responsive interactive charts/graphs: SVG, Canvas, other?
...ocessor which is able to find very fast which stars to display and is perhaps able to cluster stars which are close together, depending on the zoom. The only thing that keeps your view vivid and fast is keeping the number of stars to draw as low possible.
As you stated, that the most important thin...
Finding a branch point with Git?
...
Oops, sorry! Thank you for letting me know. I forgot to run git update-server-info. It should be good to go now. :)
– lindes
Feb 16 '11 at 7:28
...
Java 8: performance of Streams vs Collections
...t max = 10_000_000;
and ran your benchmark. My results:
Collections: Elapsed time: 8592999350 ns (8.592999 seconds)
Streams: Elapsed time: 2068208058 ns (2.068208 seconds)
Parallel streams: Elapsed time: 7186967071 ns (7.186967 seconds)
without edit (int max = 1_000_000) results wer...
Creating a daemon in Linux
...es to files (debug, error,...).
Besides that, there are a few required steps to daemonize a process.
If I remember correctly these steps are:
fork off the parent process & let it terminate if forking was successful. -> Because the parent process has terminated, the child process now run...
How exactly does __attribute__((constructor)) work?
...o the beleaguered console.
In this example... when I implicitly load this psuedo-library, let's call it... libdemure.a, via a flag in my test target á la..
OTHER_LDFLAGS = -ldemure
I want to..
At load (ie. when XCTest loads my test bundle), override the "default" XCTest "observer" class... (v...
Using .NET, how can you find the mime type of a file based on the file signature not the extension
...se and allow me to find it again if I need it.
using System.Runtime.InteropServices;
...
[DllImport(@"urlmon.dll", CharSet = CharSet.Auto)]
private extern static System.UInt32 FindMimeFromData(
System.UInt32 pBC,
[MarshalAs(UnmanagedType.LPStr)] System.String pwzUrl,
...
Skip List vs. Binary Search Tree
...tly linked to the affected node need to be locked.
Update from Jon Harrops comments
I read Fraser and Harris's latest paper Concurrent programming without locks. Really good stuff if you're interested in lock-free data structures. The paper focuses on Transactional Memory and a theoretical ope...