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Most efficient way to concatenate strings?
...should be used.
For more information, check this site.
string.Join() vs string.Concat()
The string.Concat method here is equivalent to the string.Join method invocation with an empty separator. Appending an empty string is fast, but not doing so is even faster, so the string.Concat method...
Difference between an API and SDK
...than a raw API, hence the "kit". So you're right about building something vs. using/consuming(+/controlling/interacting), but the distinction is otherwise muddled.
– Josh Sutterfield
Jan 19 '12 at 18:19
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How to Correctly Use Lists in R?
...turned results of different length in each bin. Simply returning a vector (vs. a list) won't do at all.
For instance:
stuff <- c("You, me, and dupree", "You me, and dupree",
"He ran away, but not very far, and not very fast")
x <- strsplit(stuff, ",")
xx <- unlist(strsplit(stu...
Check if database exists in PostgreSQL using shell
... psql -l | grep doesnt_matter_what_you_grep | wc -l && echo "true" vs psql -l | grep it_does_matter_here && echo "only true if grep returns anything"
– Mike Lyons
Nov 13 '13 at 17:29
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What's the most efficient way to erase duplicates and sort a vector?
...vector is always faster, up to 100x depending on the number of duplicates. VS2013, cl /Ox -D_SECURE_SCL=0.
– davidnr
Jul 9 '14 at 9:20
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Undo a git stash
... unstash your changes.
If you want to preserve the state of files (staged vs. working), use
git stash apply --index
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JavaScript check if variable exists (is defined/initialized)
...omparison === instead of simple equality ==, see:Which equals operator (== vs ===) should be used in JavaScript comparisons?
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How to create .pfx file from certificate and private key?
... file.
http://msdn.microsoft.com/en-us/library/windows/hardware/ff550672(v=vs.85).aspx
Note: if you need/want/prefer a C# solution, then you may want to consider using the http://www.bouncycastle.org/ api.
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What is the difference between Swing and AWT?
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Swing vs AWT. Basically AWT came first and is a set of heavyweight UI components (meaning they are wrappers for operating system objects) whereas Swing built on top of AWT with a richer set of lightweight components.
Any serious ...
Does Django scale? [closed]
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community wiki
15 revs, 3 users 94%Neil
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