Subject: [ruby-talk:444061] A simple question about arguments
Date: Sat 17 Dec 22 06:34:17AM +0000
Quoting Henry R via ruby-talk (ruby-talk(a)ml.ruby-lang.org):
Sorry for this newbie question.
For arguments to ruby methods, what's difference between these two?
method(x:y)
method(x=>y)
x:y is a shorthand for :x=>y. That is: a hash with one element, that
has as key *symbol* :x, and as value whatever is in variable y. In the
second case, the key of the hash is whatever you have currently in
variable x.
If you have this short script:
--8<----8<----8<----8<--
def m(h)
pp h
pp h.class
pp h.keys[0]
pp h.keys[0].class
end
x=1
y=2
m(x=>y)
print("\n")
m(x:y)
--8<----8<----8<----8<--
and run it, you obtain
{1=>2}
Hash
1
Integer
{:x=>2}
Hash
:x
Symbol
HTH
Carlo
--
* Se la Strada e la sua Virtu' non fossero state messe da parte,
* K * Carlo E. Prelz - fluido(a)fluido.as che bisogno ci sarebbe
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