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Scala type programming resources
According to this question , Scala's type system is Turing complete . What resources are available that enable a newcomer to take advantage of the power of type-level programming?
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How to detect if CMD is running as Administrator/has elevated privileges?
...ent answer instead.
Found this solution here: http://www.robvanderwoude.com/clevertricks.php
AT > NUL
IF %ERRORLEVEL% EQU 0 (
ECHO you are Administrator
) ELSE (
ECHO you are NOT Administrator. Exiting...
PING 127.0.0.1 > NUL 2>&1
EXIT /B 1
)
Assuming that doesn't ...
How to list the properties of a JavaScript object?
...ny object. Extending the prototype has some side effects and I wouldn't recommend doing it.
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Why do my list item bullets overlap floating elements
...contents of the box.
Only IE6 needs an ul { zoom: 1; } in our conditional comments to make sure the ul has layout.
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What is the “FS”/“GS” register intended for?
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How to dynamically create a class?
... public static void CreateNewObject()
{
var myType = CompileResultType();
var myObject = Activator.CreateInstance(myType);
}
public static Type CompileResultType()
{
TypeBuilder tb = GetTypeBuilder();
ConstructorBuilde...
Setting Objects to Null/Nothing after use in .NET
...only to have it save 0.1ms in 100,000 iterations all while readability was completely shot.
– Brent Rittenhouse
Aug 3 '17 at 17:10
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g++ undefined reference to typeinfo
... without defining it.
When you declare it without defining it in the same compilation unit, you're indicating that it's defined somewhere else - this means the linker phase will try to find it in one of the other compilation units (or libraries).
An example of defining the virtual function is:
vi...
Can Selenium Webdriver open browser windows silently in background?
... edited May 23 '17 at 11:47
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111 silver badge
answered Apr 24 '13 at 15:28
ArranArran
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How does one reorder columns in a data frame?
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Your dataframe has four columns like so df[,c(1,2,3,4)].
Note the first comma means keep all the rows, and the 1,2,3,4 refers to the columns.
To change the order as in the above question do df2[,c(1,3,2,4)]
If you want to output this file as a csv, do write.csv(df2, file="somedf.csv")
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