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How to remove a key from Hash and get the remaining hash in Ruby/Rails?
...
if you realy need it as a one liner do: foo(hash.delete(key) || hash)
– Bert Goethals
Jun 4 '11 at 12:40
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How to detect if app is being built for device or simulator in Swift
...tatic check.
#if (arch(i386) || arch(x86_64)) && os(iOS)
import Foo
#else
import Bar
#endif
Also, since the flag is replaced with a 0 or a 1 by the swift preprocessor, if you directly use it in a if/else expression the compiler will raise a warning about unreachable code.
In order to...
Can you provide some examples of why it is hard to parse XML and HTML with a regex? [closed]
...appear in any order, so if your regex is looking for a link with the href "foo" and the class "bar", they can come in any order, and have any number of other things between them.
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Is List a subclass of List? Why are Java generics not implicitly polymorphic?
...w type parameters to be specified as covariant, which avoids the ? extends Foo in method declarations, but that does add additional complexity.
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How can you profile a Python script?
...r code, or from the interpreter, like this:
import cProfile
cProfile.run('foo()')
Even more usefully, you can invoke the cProfile when running a script:
python -m cProfile myscript.py
To make it even easier, I made a little batch file called 'profile.bat':
python -m cProfile %1
So all I hav...
Detect changes in the DOM
...erver = new MutationObserver(callback)
// have the observer observe foo for changes in children
mutationObserver.observe( obj, { childList:true, subtree:true })
return mutationObserver
}
// browser support fallback
else if( window.addEventListener ){
obj.add...
Understanding keystore, certificates and alias
...n only release an update to an application that was signed with the alias 'foo' by signing the update again with the same alias. Losing the keystore where your alias is stored would prevent you from releasing an updated version of your app.
There is however a way to sign an app with a new alias, bu...
Escape single quote character for use in an SQLite query
...A's value could be null or contain hyphens.:
sqlite3 $db_name "insert into foo values (\"$columnA\", $columnB)";
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How to verify that method was NOT called in Moq?
...m = new Mock<ISomething>();
m.Expect(x => x.Forbidden()).Returns("foo").AtMost(0);
Although the "throws" also works, AtMost(0) is more expressive IMHO.
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How to catch integer(0)?
...hat class of object and combine it with an element of that class:
attr(a,"foo")<-"bar"
> identical(1L,c(a,1L))
[1] TRUE
Or more generally:
is.empty <- function(x, mode=NULL){
if (is.null(mode)) mode <- class(x)
identical(vector(mode,1),c(x,vector(class(x),1)))
}
b <- num...