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Rails: how do I validate that som>me m>thing is a boolean?
Does rails have a validator like validates_num>me m>ricality_of for boolean or do I need to roll my own?
5 Answers
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How to use Bash to create a folder if it doesn't already exist?
This doesn't seem to work. Can anyone help?
6 Answers
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bash assign default value
I thought I could use this feature to write ${LONG_VARIABLE_NAm>ME m>:=hello} instead of the longer LONG_VARIABLE_NAm>ME m>=${LONG_VARIABLE_NAm>ME m>:-hello} , but now bash also tries to execute 'hello' and that gives a command not found. Any way to avoid that? Or will I have to stick to the latter? Can som>me m>one...
How do I use CMake?
I am trying to use CMake in order to compile opencv.
4 Answers
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argparse store false if unspecified
How can I store false if -auto is unspecified? I can faintly rem>me m>mber that this way, it stores None if unspecified
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Run class in Jar file
If you have a jar file called myJar.jar located in /myfolder and you want to use the class called myClass from it, how do you go about doing it from the command line?
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Sequence contains no matching elem>me m>nt
I have an asp.net application in which I am using linq for data manipulation. While running, I get the exception "Sequence contains no matching elem>me m>nt".
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`elif` in list comprehension conditionals
Can we use elif in list comprehension?
6 Answers
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m>Me m>thods inside enum in C#
In Java, it's possible to have m>me m>thods inside an enum.
6 Answers
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Custom ListView click issue on items in Android
So I have a custom ListView object. The list items have two textviews stacked on top of each other, plus a horizontal progress bar that I want to remain hidden until I actually do som>me m>thing. To the far right is a checkbox that I only want to display when the user needs to download updates to their d...