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FixedThreadPool vs CachedThreadPool: the lesser of two evils
...utors.newCachedThreadPool and Executors.newFixedThreadPool are both backed by the same thread pool implementation (at least in the open JDK) just with different parameters. The differences just being their thread minimum, maximum, thread kill time, and queue type.
public static ExecutorService new...
Quick-and-dirty way to ensure only one instance of a shell script is running at a time
...yscript.exclusivelock
This ensures that code between ( and ) is run only by one process at a time and that the process doesn’t wait too long for a lock.
Caveat: this particular command is a part of util-linux. If you run an operating system other than Linux, it may or may not be available.
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How do you push just a single Git branch (and no other branches)?
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By default git push updates all the remote branches. But you can configure git to update only the current branch to it's upstream.
git config push.default upstream
It means git will update only the current (checked out) br...
How can you dynamically create variables via a while loop? [duplicate]
...at are implemented as dictionaries too. I wonder why I have been downvoted by some downvote sniper for my answer creating an item in globals() while the answer of Gintautas Miliauskas is upvoted and this answer that doesn't give the how-to for <dynamically create key> is upvoted 3 times.
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How are people managing authentication in Go? [closed]
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However I've finally located one concrete example, (generously) provided by a member of the golang-nuts mailing list:
https://groups.google.com/forum/#!msg/golang-nuts/GE7a_5C5kbA/fdSnH41pOPYJ
This provides a suggested schema and server-side implementation as a basis for custom authentication. T...
Is it possible to set the equivalent of a src attribute of an img tag in CSS?
...e.png);">
How it works:
The image is shrunk until no longer visible by the width & height.
Then, you need to 'reset' the image size with padding. This
one gives a 16x16 image. Of course you can use padding-left /
padding-top to make rectangular images.
Finally, the new image is put there...
How to achieve code folding effects in Emacs?
...support imenu. M-ximenu will let you jump to a function definition (etc.) by name. You can also bind it to a mouse click to get a menu of functions (or add it to the menubar; see the Info page for more detail). It provides data for which-function-mode, which will let you see which function you ar...
How can I loop through a C++ map of maps?
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@TannerSummers because accessing by value would add the inefficiency of copying each element; additionally if you wanted to modify the contents, you'd need to access the elements by references (or pointers) rather than by value.
– Riot
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Elevating process privilege programmatically?
...u can indicate the new process should be started with elevated permissions by setting the Verb property of your startInfo object to 'runas', as follows:
startInfo.Verb = "runas";
This will cause Windows to behave as if the process has been started from Explorer with the "Run as Administrator" men...
How to count the number of occurrences of an element in a List
...<String, Long> counts =
list.stream().collect(Collectors.groupingBy(e -> e, Collectors.counting()));
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