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How to compare two colors for similarity/difference
...y Vadim will not match the human-perceived distance between colors. For a start, Lab* is intended to be a perceptually uniform colorspace, and the deltaE metric is commonly used. But there are more refined colorspaces and more refined deltaE formulas that get closer to matching human perception.
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Quick-and-dirty way to ensure only one instance of a shell script is running at a time
...in a comment on anther answer, this has a fatal flaw - if the other script starts up between the check and the echo, you're toast.
– Paul Tomblin
Oct 9 '08 at 0:43
1
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How to add a new row to an empty numpy array
...
The way to "start" the array that you want is:
arr = np.empty((0,3), int)
Which is an empty array but it has the proper dimensionality.
>>> arr
array([], shape=(0, 3), dtype=int64)
Then be sure to append along axis 0:
arr...
Java packages com and org
...or organisations have a .com, or .org domain name, and hence most packages start with com. or org.. To quote from the Sun Code Conventions:
The prefix of a unique package name is always written in all-lowercase ASCII letters and should be one of the top-level domain names, currently com, edu, gov, ...
Signal handling with multiple threads in Linux
...t;
}
/*
* Found a killable thread. If the signal will be fatal,
* then start taking the whole group down immediately.
*/
if (sig_fatal(p, sig) &&
!(signal->flags & SIGNAL_GROUP_EXIT) &&
!sigismember(&t->real_blocked, sig) &&
(sig == SIGKILL || !...
How can I install from a git subdirectory with pip?
...y" component is used. Value of "subdirectory" component
should be a path starting from root of the project to where setup.py
is located.
So if your repository layout is:
- pkg_dir/
- setup.py # setup.py for package ``pkg``
- some_module.py
- other_dir/
- some_file
- some_other_file
...
How are people managing authentication in Go? [closed]
...ngs with beginners. I wonder what kind of thing that a beginner should get started with it. go-http-auth or gomniauth or both of them?
– Casper
Jun 30 '16 at 2:29
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How to view the Folder and Files in GAC?
...
Launch the program "Run" (Windows Vista/7/8: type it in the start menu search bar) and type:
C:\windows\assembly\GAC_MSIL
Then move to the parent folder (Windows Vista/7/8: by clicking on it in the explorer bar) to see all the GAC files in a normal explorer window. You can now copy,...
How can I tell IntelliJ's “Find in Files” to ignore generated files?
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You can also put the search file filter starting with ! sign to exclude.
Example to search code not in Test Java files:
!*Test.java
If you have a few types of files you can separate with , sign.
Example to search in Kotlin and Groovy files only:
*.kt,*.groovy
Thi...
Stash changes while keeping the changes in the working directory in Git
...o run an external command, rather than a Git subcommand. In that case, you start the command with a ! character."
– madhead
May 10 '17 at 12:20
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