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How to test valid UUID/GUID?
...FC4122.
NOTE: Braces { and } are not canonical. They are an artifact of some systems and usages.
Easy to modify the above regex to meet the requirements of the original question.
HINT: regex group/captures
To avoid matching NIL UUID:
/^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-...
Assign output of a program to a variable using a MS batch file
...a batch file rather than on the command line. Imagine, your test.bat has something like:
for /f %%i in ('c:\cygwin64\bin\date.exe +"%%Y%%m%%d%%H%%M%%S"') do set datetime=%%i
echo %datetime%
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How do I select a merge strategy for a git rebase?
git-rebase man page mentions -X<option> can be passed to git-merge . When/how exactly?
3 Answers
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How to save a plot as image on the disk?
...p(), pdf() or similar
Plot your model
Close the device using dev.off()
Some example code for saving the plot to a png file:
fit <- lm(some ~ model)
png(filename="your/file/location/name.png")
plot(fit)
dev.off()
This is described in the (combined) help page for the graphical formats ?png, ?...
Checkout old commit and make it a new commit [duplicate]
On Git, say I mess up my commits, and I want to make the version 3 commits ago as the new version. If I do git checkout xxxx , it creates a new branch and it seems like I can only merge it? Could I make this the new "master version"?
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In Clojure how can I convert a String to a number?
I have various strings, some like "45", some like "45px". How how I convert both of these to the number 45?
12 Answers
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Pass a JavaScript function as parameter
How do I pass a function as a parameter without the function executing in the "parent" function or using eval() ? (Since I've read that it's insecure.)
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Do we need semicolon at the end? [duplicate]
I missed semicolons in some of the places in my JavaScript, but its not throwing error in any of the browsers. Is the ; at the end needed?
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Java - sending HTTP parameters via POST method easily
I am successfully using this code to send HTTP requests with some parameters via GET method
17 Answers
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Redirect non-www to www in .htaccess
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This solution doesn't work when some pages (like login or sign up) use https protocol.
– Alexey Kosov
Nov 27 '14 at 7:47
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