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How to sort a list of objects based on an attribute of the objects?
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No problem. btw, if muhuk is right and it's a list of Django objects, you should consider his solution. However, for the general case of sorting objects, my solution is probably best practice.
– Triptych
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Connect to Amazon EC2 file directory using Filezilla and SFTP
... ppk format. Click Yes, then give the file a name and store it somewhere.
If the new file is shown in the list of Keyfiles, then continue to the next step. If not, then click "Add keyfile..." and select the converted file.
File > Site Manager Add a new site with the following parameters:
Host...
Any equivalent to .= for adding to beginning of string in PHP?
Just wondering if there is something like .= for adding text to the beginning of a string, e.g.:
5 Answers
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Docker how to change repository name or rename image?
...o you can have as many of them associated with the same image as you like. If you don't like the old name you can remove it after you've retagged it:
docker rmi server
That will just remove the alias/tag. Since d583c3ac45fd has other names, the actual image won't be deleted.
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Clojure differences between Ref, Var, Agent, Atom, with examples
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In coordinated access, if I want to only change state-a, but refer to state-b in doing so, I still need a ref correct? So it's not changing multiple things but referring to multiple things while changing any of them?
– event_...
Cleanest way to get last item from Python iterator
... is precisely what None is for. Are you suggesting that some function-specific default value could even be correct? If the iterator doesn't actually iterate, then an out-of-band value is more meaningful than some misleading function-specific default.
– S.Lott
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Add a prefix string to beginning of each line
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# If you want to edit the file in-place
sed -i -e 's/^/prefix/' file
# If you want to create a new file
sed -e 's/^/prefix/' file > file.new
If prefix contains /, you can use any other character not in prefix, or
escape t...
Slicing of a NumPy 2d array, or how do I extract an mxm submatrix from an nxn array (n>m)?
...The buffer assigned to x will contain 16 ascending integers from 0 to 15. If you access one element, say x[i,j], NumPy has to figure out the memory location of this element relative to the beginning of the buffer. This is done by calculating in effect i*x.shape[1]+j (and multiplying with the size ...
How to cherry-pick multiple commits
...mit A to commit B (where A is older than B), run:
git cherry-pick A^..B
If you want to ignore A itself, run:
git cherry-pick A..B
(Credit goes to damian, J. B. Rainsberger and sschaef in the comments)
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Restore the state of std::cout after manipulating it
...ppet:
void printHex(std::ostream& x) {
boost::io::ios_flags_saver ifs(x);
x << std::hex << 123;
}
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