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Understanding what 'type' keyword does in Scala
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Suppose you have the following scenario:
Here you will get compilation error, because eat method in classes Cow and Tiger do not override the eat method in class Animal, because their parameter types are different. It's Grass in class Cow, and Meat in class Tiger vs. Food in class Animal which i...
A beginner's guide to SQL database design [closed]
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The Celko book is a study in errors, and furthers the notion of implementing in code, what should be implemented in the database.
– PerformanceDBA
Apr 26 '15 at 2:05
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Convert.ChangeType() fails on Nullable Types
... (t.IsEnum)
return (T)Enum.Parse(t, value);
Normally you'd have some error checking or use TryParse instead of Parse, but you get the picture.
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How to get a float result by dividing two integer values using T-SQL?
...understand that CASTing to FLOAT is not allowed in MySQL and will raise an error when you attempt to CAST(1 AS float) as stated at MySQL dev.
The workaround to this is a simple one. Just do
(1 + 0.0)
Then use ROUND to achieve a specific number of decimal places like
ROUND((1+0.0)/(2+0.0), 3)
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Can you define aliases for imported modules in Python?
...ules.
– DigitalEye
Oct 22 '15 at 18:05
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The reason this is possible is that modules are first-cl...
How to set child process' environment variable in Makefile
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I have GNU make 3.81, and all: <\n\t>export PROJ_ROOT=$(CURDIR)<\n\t>echo $(PROJ_ROOT)<\n> outputs the correct expansion for the first row, but only echo for the second one. PROJ_ROOT is not set after running make. Spaces around = gi...
decorators in the python standard lib (@deprecated specifically)
...r('always', DeprecationWarning) # turn off filter
warnings.warn("Call to deprecated function {}.".format(func.__name__),
category=DeprecationWarning,
stacklevel=2)
warnings.simplefilter('default', DeprecationWarning) # reset filter
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Unit testing that events are raised in C# (in order)
...ited May 12 '11 at 15:38
David Hall
30.2k1010 gold badges8484 silver badges119119 bronze badges
answered Oct 30 '08 at 1:45
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How do I change the string representation of a Python class? [duplicate]
... functions. Json dumps treats the object as a dictionary, and will convert all keys to strs.
– mchicago
Mar 7 '14 at 12:14
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Windows下如何判断Win32 or x64？ - C/C++ - 清泛网 - 专注C/C++及内核技术
...uld load it by function GetProcAddress, because
* it is not available on all version of Windows.
*/
LPFN_ISWOW64PROCESS fnIsWow64Process = NULL;
/**
* This function tells if your application is a x64 program.
*/
BOOL Isx64Application() {
return (sizeof(LPFN_ISWOW64PROCESS) == 8)? T...