From: Robert Klemme <shortcutter@...>
Date: 2006-08-11T15:10:13+09:00
Subject: Re: Simple question regarding hashes

x1 wrote:
> Is something like this possible?
> 
> asdf = {"letters" => |||||some code that returns something|||||}
> 
> This is difficult for me to explain being that im not a "programmer"
> but.. here's what im trying to do:
> 
> asdf = {"letters" => (if 1+1 == 3; return "yes";else return "no";end)}
> ###  in hopes that this would set asfd['letters'] equal to "no"
> 
> or.. something like this:
> asdf = {"letters" => ["a", "b", "c"].each {|letter| yield letter if
> letter != "b"}}
> ###  in hopes that asdf['letters'] will equal ["a", "b"]
> 
> 
> i realize, I could do ["a", "b", "c"].delete("b") but my question is
> can you define the value of a hash based on an iteration, or an if
> statement etc..
> 
> 
> Thank you

Do you want to use the calculation only once, i.e. on insertion?  Then

hash = {"foo" => (1+1 == 3 ? "yes" : "no")}
hash = {"foo" => if 1+1 == 3 then "yes" else "no" end}

	robert