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How to install 2 Anacondas (Python 2 and 3) on Mac OS
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Then how can I switch between python2 and python3? And BTW, I'm on win7.
– cqcn1991
Jun 12 '15 at 10:27
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What exactly does git's “rebase --preserve-merges” do (and why?)
...rst identifies a list of commits made in one part of the commit graph, and then replays those commits on top of another part. The differences with --preserve-merges concern which commits are selected for replay and how that replaying works for merge commits.
To be more explicit about the main diffe...
How do I check if file exists in Makefile so I can delete it?
... when the target is built by make. If you delete the file in the meantime then the file won't be created. I have put in an edit to make it clearer.
– Michael
Jan 26 '19 at 10:58
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Unable to import a module that is definitely installed
...files and directories will be over-restricted. If you simply su first and then do the install from a full root shell, the resulting install is usable (at least it is for me). This was for pip, but may apply to apt-get as well. If others confirm this cause, may want to amend the answer accordingly...
java.lang.OutOfMemoryError: Java heap space
...as the memory before the test, and after, and if there is too big a change then you may want to examine it, but, you need to do the check while your test is still running.
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PostgreSQL ERROR: canceling statement due to conflict with recovery
... on secondary it thinks it can clean up (vacuum) old versions of its rows. Then secondary has to replay this cleanup, and has to forcibly cancel all queries which can use these rows.
Longer queries will be canceled more often.
You can work around this by starting a repeatable read transaction on p...
Redirecting EC2 Elastic Load Balancer from HTTP to HTTPS
...can use it to detect if original request was to HTTP and redirect to HTTPS then.
You can try this in your server conf:
if ($http_x_forwarded_proto = 'http') {
return 301 https://yourdomain.com$request_uri;
}
Take a look at ELB docs.
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How can I find script's directory with Python? [duplicate]
...ectory containing the script. Now if you compile your script to binary and then execute it, well, then sys.path[0] would refer to %temp% since exe runs from temp. At least this is the case on Windows.
– user6037143
Nov 16 '18 at 19:44
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What's the absurd function in Data.Void useful for?
...or perfectly well behaved computations in this setting, take e to be Void, then use
either absurd id :: Either Void v -> v
to run safely or
either absurd Right :: Either Void v -> Either e v
to embed safe components in an unsafe world.
Oh, and one last hurrah, handling a "can't happen"....
When and why JPA entities should implement Serializable interface?
...types you pass in to whatever the DB understands. When you run native SQL, then you must do the mapping yourself. If you don't, then the default mapping is to serialize the parameter and send it to the database (in the hope that it does understand it).
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