On Saturday, 23 March 2013 at 19:56:17 UTC, deadalnix wrote:
On Saturday, 23 March 2013 at 15:55:36 UTC, John Colvin wrote:
On Saturday, 23 March 2013 at 15:00:13 UTC, bearophile wrote:
foobar:
Code that needs named parameters to be more readable is
poorly designed code in the first place.
Have you used a language where the usage of named arguments
is idiomatic, like Python, Scala or Ada? They are sometimes
useful even for well designed code, like functions with two
arguments.
Bye,
bearophile
A simple example is matplotlib.pyplot.plot
There are so many possible flags and parameters that can be
passed in order to get the exact behaviour you want, but
commonly you'll only want a few set for each call. You don't
want to have to set all the other preceding parameters, you
just want to go e.g. plot(data, linewidth=5)
Can't the monadic style thing do the trick ?
Named!plot.linewidth(5).call(data);
This is doable with actual D using compile time reflection.
Good point, and I'm sure we all develop our personal sense of
'code smell' based on our own past experience. I find adding lots
of enums to be like doing RAII in C++: I find it a pain to have
to pollute namespaces with extra enums (classes), just to get
readability/safety.
To me, the builder/monadic style is clunky and harder to read. I
find
plot(data, linewidth = 5)
to be clean, clear, and more concise.
