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What does it mean in shell when we put a command inside dollar sign and parentheses: $(command)
...lue inside the variable name, but what is $(command) supposed to return? Does it return the value after executing the command? In that case, we can use ` to execute the command.
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How can I visualize per-character differences in a unified diff file?
...modified, but I cannot see which characters in the changed lines differ. Does anyone know a way (in Vim, or some other free software that runs on Ubuntu) to visualize per-character differences?
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How does “cat
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if true; then
cat <<-EOF
a
EOF
fi
Unfortunately, this does not work for space characters: POSIX favored tab indentation here. Yikes.
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'Missing recommended icon file - The bundle does not contain an app icon for iPhone / iPod Touch of
...;/string>
</array>
Found this here by searching for "The bundle does not contain an app icon for iPhone / iPod Touch of exactly '120x120' pixels, in .png format." in Google.
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How does BLAS get such extreme performance?
... play a minor role in this respect (and for GotoBLAS/OpenBLAS the compiler does not matter at all).
IMHO no BLAS implementation uses algorithms like the Coppersmith–Winograd algorithm or the Strassen algorithm. The likely reasons are:
Maybe its not possible to provide a cache optimized implemen...
What does the star operator mean, in a function call?
What does the * operator mean in Python, such as in code like zip(*x) or f(**k) ?
5 Answers
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Why does substring slicing with index out of range work?
Why doesn't 'example'[999:9999] result in error? Since 'example'[9] does, what is the motivation behind it?
3 Answers
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Why does (1 in [1,0] == True) evaluate to False?
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nice catch, I didn't even think of that. It doesn't make much sense to allow chaining of in - after all x < y < z makes sense, but not so much with x in y in z
– BlueRaja - Danny Pflughoeft
Feb 14 '12 at 22:00
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Check if two lists are equal [duplicate]
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Slow and doesn't handle duplicates. [1, 1, 2] != [1, 2, 2]
– CodesInChaos
Mar 4 '14 at 15:42
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How to use sed/grep to extract text between two words?
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@JayD sed does not support non-greedy matching, see this question for some recommended alternatives.
– Brian Campbell
May 19 '15 at 14:11
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