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Image fingerprint to compare similarity of many images
...should definitely take a look at phash.
For image comparison there is this php project :
https://github.com/kennethrapp/phasher
And my little javascript clone:
https://redaktor.me/phasher/demo_js/index.html
Unfortunately this is "bitcount"-based but will recognize rotated images.
Another approach in...
How does SIGINT relate to the other termination signals such as SIGTERM, SIGQUIT and SIGKILL?
...ting things such as:
The signals SIGKILL and SIGSTOP cannot be caught, blocked, or ignored.
and contains the table:
Signal Value Action Comment
----------------------------------------------------------------------
SIGHUP 1 Term Hangup detected on controlling termina...
Angular.js ng-repeat across multiple tr's
...lable-table-wrapper{
background:#268;border:1px solid #268;
display:inline-block;height:285px;min-height:285px;
max-height:285px;width:550px;position:relative;overflow:hidden;padding:26px 0}
div.scrollable-table-wrapper table{position:static}
div.scrollable-table-wrapper tfoot,div.scrollable-table-...
Safe characters for friendly url [closed]
...ct is fairly straightforward: [...] params.toString() // "key=730d67"" (3) PHP Manual, http-build-query: "Generate URL-encoded query string. [...] The above example will output: 0=foo&1=bar[...]" (4) J. Starr, Perishable Press: "When building web pages, it is often necessary to add links that re...
Automatic Retina images for web sites
...ring the screen resolution, a web server configured to serve images from a PHP script, and named script to read the cookie and serve the appropriate image.
A bunch of possibilities well described and discussed on Smashing Magazine.
Serving just slightly higher resolutions to smooth retina portrayal ...
How do I get both STDOUT and STDERR to go to the terminal and a log file?
...tion,
is not race prone, and isn't terribly fiddly either.
First building block: to swap stdout and stderr:
my_command 3>&1 1>&2 2>&3-
Second building block: if we wanted to filter (e.g. tee) only stderr,
we could accomplish that by swapping stdout&stderr, filtering, and...
How to start two threads at “exactly” the same time
...tuff
}};
t1.start();
t2.start();
// At this point, t1 and t2 are blocking on the gate.
// Since we gave "3" as the argument, gate is not opened yet.
// Now if we block on the gate from the main thread, it will open
// and all threads will start to do stuff!
gate.await();
System.out.print...
SVN encrypted password store
... You can get it without recompiling, based on ubuntuforums.org/showthread.php?t=1348567. Just set this to ~/.subversion/config [auth] password-stores = gnome-keyring
– fikr4n
Apr 29 '12 at 3:21
...
How to UPSERT (MERGE, INSERT … ON DUPLICATE UPDATE) in PostgreSQL?
...he other gets a duplicate key error and does an UPDATE instead. The UPDATE blocks waiting for the INSERT to rollback or commit. When it rolls back, the UPDATE condition re-check matches zero rows, so even though the UPDATE commits it hasn't actually done the upsert you expected. You have to check th...
Running a cron job at 2:30 AM everyday
...running you can check Debugging crontab or Why is crontab not executing my PHP script?.
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