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How do I use sudo to redirect output to a location I don't have permission to write to?
...and STDOUT separately here: stackoverflow.com/questions/692000/… ... basically perl -e 'print "STDIN\n"; print STDERR "STDERR\n"; ' > >( tee stdout.log ) 2> >( tee stderr.log >&2 )
– errant.info
Jun 13 '13 at 11:40
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Finding all possible permutations of a given string in python
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The itertools module has a useful method called permutations(). The documentation says:
itertools.permutations(iterable[, r])
Return successive r length permutations of elements in the iterable.
If r is not specified or is None, then r defaults to the ...
Is there an equivalent to CTRL+C in IPython Notebook in Firefox to break cells that are running?
...just sends a SIGINT signal to the code that you're currently running (this idea is supported by Fernando's comment here), which is the same thing that hitting CTRL+C would do. Some processes within python handle SIGINTs more abruptly than others.
If you desperately need to stop something that is r...
Converting bool to text in C++
... iostreams that are backed not by the console or a file, but by an automatically managed string buffer. They're called stringstreams. #include <sstream> to get them. Then we can say:
std::string bool_as_text(bool b)
{
std::stringstream converter;
converter << std::boolalpha &l...
Difference between fold and reduce?
...st element type, whereas they can differ in fold as the accumulator is provided separately. This is reflected in the types:
List.fold : ('State -> 'T -> 'State) -> 'State -> 'T list -> 'State
List.reduce : ('T -> 'T -> 'T) -> 'T list -> 'T
In addition reduce throws an e...
How do I use Java to read from a file that is actively being written to?
...s code consumes a lot of CPU because the loop does not have a thread.sleep call in it. Without adding a small amount of delay this code tends to keep the CPU very busy.
– ChaitanyaBhatt
May 11 '17 at 22:31
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Express: How to pass app-instance to routes from a different file?
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Use req.app, req.app.get('somekey')
The application variable created by calling express() is set on the request and response objects.
See: https://github.com/visionmedia/express/blob/76147c78a15904d4e4e469095a29d1bec9775ab6/lib/express.js#L34-L35
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Why do we need boxing and unboxing in C#?
... it into o. o is a reference to something somewhere, and the int is emphatically not a reference to something somewhere (after all, it's just a number). So, what you do is this: you make a new object that can store the int and then you assign a reference to that object to o. We call this process "bo...
static constructors in C++? I need to initialize private static objects
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+1 (didn't try it out) But: When is ctor _init._init() called? Before or after the ctor of MyClass when I have a static MyClass object? I guess you can't tell...
– ur.
Jan 28 '10 at 16:18
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Error handling with node.js streams
... the data as it is piped through the stream. You may want to do some async calls, for example, or derive a couple of fields, remap some things, etc.
For how to create a transform stream see here and here. All you have to do is :
include the stream module
instantiate ( or inherit from) the...