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How to make a flat list out of list of lists?
...the previous intermediate result must be copied over (as well as a few new ones added at the end). So, for simplicity and without actual loss of generality, say you have L sublists of I items each: the first I items are copied back and forth L-1 times, the second I items L-2 times, and so on; total ...
How to remove a file from the index in git?
...iles or directories to .gitignore, stage and commit as normal. They'll be gone from the repo but remain untouched in your local tree, and you won't accidentally check them in again.
– Ionoclast Brigham
Dec 7 '14 at 6:27
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How do you test a public/private DSA keypair?
...k server has a few dozen id_rsa.pub.blahhost files and I didn't know which one matched the lone id_rsa private key & I'm setting up passwordless scp so I can migrate off old websites. Making a new key pair is not an option; I've got my keys set up well and not going to mess that up.
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Join a list of items with different types as string in Python
...hem. For example, if you have a list of integers then you can convert them one by one in a for-loop and join them with ,:
print(','.join(str(x) for x in list_of_ints))
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Is there a /dev/null on Windows?
...write in code, and the error was getting swallowed. I'm deleting it so no one accidentally takes it as the truth.
– Jim Hunziker
Jul 22 '10 at 19:30
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How do I immediately execute an anonymous function in PHP?
...t an immediately executing function, because the function I am defining is one which SHOULDN'T be called more than once in normal execution. The problem with defining a named function, run(), like you have, is that anyone else who sees the code may think that they can call run() too in some other p...
Removing App ID from Developer Connection
...unesConnest, and then its associated budle identifier, once it is at least one time approved by apple. The app never approved, but submitted to itunesconnect cannot be removed at all. So, since then it becomes a trash.
– Bartłomiej Semańczyk
Dec 3 '15 at 10:1...
Best practice to call ConfigureAwait for all server-side code
...l thread context.
This is true with UI applications, where there is only one UI thread that you have to "sync" back to.
In ASP.NET, the situation is a bit more complex. When an async method resumes execution, it grabs a thread from the ASP.NET thread pool. If you disable the context capture using...
Nested defaultdict of defaultdict
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One note. If you are trying to use this code while pickling lambda won't work.
– Viacheslav Kondratiuk
Apr 3 '17 at 11:52
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Can I use GDB to debug a running process?
...roved security in the Linux kernel - for example attaching to the child of one shell from another.
You'll likely need to set /proc/sys/kernel/yama/ptrace_scope depending on your requirements. Many systems now default to 1 or higher.
The sysctl settings (writable only with CAP_SYS_PTRACE) are:
0 -...