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Rails raw SQL example
How can I convert this code to raw sql and use in rails? Because When I deploy this code in heroku,there is a request timeout error.I think this will be faster if I use raw sql.
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How do I use boolean variables in Perl?
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@BlueWaldo: you can also use cmp and <=> when comparing and assigning the results of the comparison to a scalar. $var = $var1 cmp $var2; 'cmp' and '<=>' (used for numeric comparisons) returns -1, 0, or 1 if left argument is less than, equal to,...
What is the difference between user variables and system variables?
What is the difference between user variables such as PATH , TMP , etc. and system variables?
5 Answers
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Start/Stop and Restart Jenkins service on Windows
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Open Console/Command line --> Go to your Jenkins installation directory. Execute the following commands respectively:
to stop:
jenkins.exe stop
to start:
jenkins.exe start
to restart:
jenkins.exe restart
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What does cherry-picking a commit with Git mean?
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Cherry picking in Git means to choose a commit from one branch and apply it onto another.
This is in contrast with other ways such as merge and rebase which normally apply many commits onto another branch.
Make sure you are on the branch you want to apply the commit to.
git checkout...
How can I use a DLL file from Python?
...y.
hllDll = ctypes.WinDLL ("c:\\PComm\\ehlapi32.dll")
# Set up prototype and parameters for the desired function call.
# HLLAPI
hllApiProto = ctypes.WINFUNCTYPE (
ctypes.c_int, # Return type.
ctypes.c_void_p, # Parameters 1 ...
ctypes.c_void_p,
ctypes.c_void_p,
ctypes.c...
Worst security hole you've seen? [closed]
...opping cart. The software properly calculated the total cost as .1 * cost, and the human packing the order simply glossed over the odd "." in front of the quantity to pack :)
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Django rest framework, use different serializers in the same ModelViewSet
I would like to provide two different serializers and yet be able to benefit from all the facilities of ModelViewSet :
6 A...
Comparison of C++ unit test frameworks [closed]
...ticles:
Exploring the C++ Unit Testing Framework Jungle, By Noel Llopis.
And the more recent: C++ Test Unit Frameworks
I have not found an article that compares googletest to the other frameworks yet.
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Converting RGB to grayscale/intensity
... from RGB to grayscale, it is said that specific weights to channels R, G, and B ought to be applied. These weights are: 0.2989, 0.5870, 0.1140.
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