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How does deriving work in Haskell?
...n $ (simpleName $ name d, paramsA d, consA d, termsA d)
_ -> error ("derive: not a data type declaration: " ++ show d)
where
consA (DataD _ _ _ cs _) = map conA cs
consA (NewtypeD _ _ _ c _) = [ conA c ]
{- This part no longer works on 7.6.3
p...
How to get the directory of the currently running file?
...
Is it possible for there to be an error here? If so, what would the error be, just out of curiosity?
– Jeff Escalante
Jun 30 '14 at 15:59
4...
Python Flask, how to set content type
...nswer
– Omer Dagan
May 18 '15 at 14:05
There is a drawback: it allows you only ADD headers. When I did it, I ended up ...
How to print without newline or space?
...
– Nathan Basanese
Aug 31 '15 at 19:05
23
@nathanbasanese Simple or not, it has a side effect tha...
“Unknown class in Interface Builder file” error at runtime
Even though Interface Builder is aware of a MyClass , I get an error when starting the application.
46 Answers
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How to get multiple selected values of select box in php?
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– Kyle Bridenstine
Apr 21 '15 at 5:05
3
This is an old answer, but this is a misleading answer! ...
How ViewBag in ASP.NET MVC works
... you! ;^)
– ruffin
Feb 26 '16 at 15:05
2
@ruffin another case of when the documentation lies and ...
PHP exec() vs system() vs passthru()
...n status"). Zero usually means it was successful, other values are usually error codes.
Other misc things to be aware of:
The shell_exec() and the backticks operator do the same thing.
There are also proc_open() and popen() which allow you to interactively read/write streams with an executing co...
Getting attributes of a class
... |
edited Jan 30 '12 at 2:05
answered Jan 30 '12 at 1:26
Be...
Does VBA have Dictionary Structure?
...lic Function Contains(col As Collection, key As Variant) As Boolean
On Error Resume Next
col(key) ' Just try it. If it fails, Err.Number will be nonzero.
Contains = (Err.Number = 0)
Err.Clear
End Function
Edit 24 June 2015: Shorter Contains() thanks to @TWiStErRob.
Edit 25 Septemb...