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How to set environment variable for everyone under my linux system?
...thing like this in them to set up an environement variable:
export MY_VAR=xxx
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Import package.* vs import package.SpecificType [duplicate]
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A good reason to never use import xxx.* is to have a clear vision of dependencies.
You can know quicker that you are using a specific class of another package because it is listed right at the beginning of the source file.
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How can I write output from a unit test?
...tion. When a test is selected, it shows you the result with "Elapsed time: xxx". Below that is the "Output" link.
– kevin
May 18 '14 at 11:00
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Useful GCC flags for C
Beyond setting -Wall , and setting -std=XXX , what other really useful, but less known compiler flags are there for use in C?
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Google Developer Tools “Network” Tab clears after redirect
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"Preserve log" in Chrome 72.xxx doesn't prevent replacement of POST requests after the server sends a redirect. This is very disappointing given this is a developer tool... :-( Apparently, the issue is manifesting itself when you are filtering requests...
Find all packages installed with easy_install/pip?
...s():
print(package.location) # you can exclude packages that's in /usr/XXX
print(join(package.location, package._get_metadata("top_level.txt"))) # root directory of this package
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How do I debug an MPI program?
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@osgx You can do this by saving the commands ("break xxx", "break yyy", "run") to <file> and passing -x <file> to gdb.
– eush77
May 22 '16 at 18:10
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What does upstream mean in nginx?
...eans all requests for / go to the any of the servers listed under upstream XXX, with a preference for port 8000.
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Merge pull request to a different branch than default, in Github
...u to do:
$ git fetch origin
$ git checkout *target_branch*
$ git merge pr/XXX
$ git push origin *target_branch*
The commands above only work directly if you first add the following line to your .git/config file:
fetch = +refs/pull/*/head:refs/remotes/symbolic_name_origin_or_upstream/pr/*
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What is the Swift equivalent to Objective-C's “@synchronized”?
... This very interesting article explains a pitfall with objc_sync_xxx: straypixels.net/swift-dictionary-locking
– Mike Taverne
Apr 30 '19 at 18:17
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