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What is the proper way to test if a parameter is empty in a batch file?
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if "!param1!"=="" ( echo it is empty )
rem ... or use the DEFINED keyword now
if defined param1 echo There is something
The advantage of this is that dealing with param1 is absolutly safe.
And the setting of param1 will work in many cases, like
test.bat hello"this is"a"test
test.bat you^&...
How to check if an array field contains a unique value or another array in MongoDB?
I am using mongodb now.
2 Answers
2
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Array slices in C#
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Does anyone know WHY it's not IEnumerable? I don't. It seems like it should be.
– Fantius
Dec 29 '10 at 22:08
2
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iPhone Simulator - Simulate a slow connection?
... You can download "Hardware IO Tools" from Apple's developer tools site now. They update it for new releases of Xcode (and thus OSX): In Xcode, click Xcode -> Open Developer Tool -> More Developer Tools..., login, find the latest archive, download, copy the files somewhere, double click th...
UIView bottom border?
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@Flea now, with modules enabled, you shouldn't add QuartzCore.framework anymore.
– ma11hew28
Dec 31 '13 at 0:43
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How to suppress “unused parameter” warnings in C?
...tatic void UNUSED_FUNCTION(foo)(int bar) { ... }
Note 1):
As far as I know, MSVC doesn't have an equivalent to __attribute__((__unused__)).
Note 2):
The UNUSED macro won't work for arguments which contain parenthesis,so if you have an argument like float (*coords)[3] you can't do,float UNUSED...
The term 'Update-Database' is not recognized as the name of a cmdlet
...using EF5 beta1 and while I was able to run the "Update-Database" before. Now that I shut down Visual Studio, I cannot get it to run. I get the following error:
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Run automatically program on startup under linux ubuntu [closed]
...x /etc/init.d/filename
sudo update-rc.d filename defaults
Script should now start on boot. Note that this method also works with both hard links and symbolic links (ln).
Edit
At this point in the boot process PATH isn't set yet, so it is critical that absolute paths are used throughout. BUT, as p...
Why don't :before and :after pseudo elements work with `img` elements? [duplicate]
...specification.
I guess this means they don't work with img elements (for now).
Also see this answer.
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“Cannot send session cache limiter - headers already sent” [duplicate]
...ady sent the HTTP headers, and as such it can't make modifications to them now.
Check that you don't send ANY content before calling session_start. Better yet, just make session_start the first thing you do in your PHP file (so put it at the absolute beginning, before all HTML etc).
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