Newby question determining name of an array at run-time

Ruby
1

(Sorry for not finding a better title to my question. I’m not shure if
this has something to do with metaprogramming… I have hear about that,
but never had time to learn about it, so I don’t know what is
metaprogramming exactly)

Is there a way to do something like this?

arr = [ “red”, “green”, “yellow” ]

the following arrays should be incremented with the loop down

@red = []
@green = []
@yellow = []

#here the loop that should increment the arrays
20.times do
arr.each { |color|
rand(60)
unless @color.include?(aleat) #this doesn’t work
@color.push(aleat) # this doesn’t work…
end
}
end
…
…

Thanks in advance.

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2

On 12/1/06, Alfonso [email protected] wrote:

the following arrays should be incremented with the loop down

  end

}
end
…
…

Have a look at instance_variable_get in the RDocs - that’ll do what you
want.

Cheers,
Max

3

Alfonso wrote:

the following arrays should be incremented with the loop down

@red = []
@green = []
@yellow = []

Are you after named arrays? Do it this way:

hash = {}

hash[:red] = []
hash[:green] = []
hash[:blue] = []

hash.keys.each do |color|
array = hash[color]
#do something here
end

But if you need to go through the colors in a particular order:

[ :red,:green,:blue ].each do |color|

etc.

#here the loop that should increment the arrays
20.times do
arr.each { |color|
rand(60)
unless @color.include?(aleat) #this doesn’t work
@color.push(aleat) # this doesn’t work…
end
}
end

It always helps for you to say what you are trying to do, not just that
it
didn’t work.

4

The method instance_variable_get was exactly what I needed.

Thank you very much for your answers

LLama Gratis a cualquier PC del Mundo.
Llamadas a fijos y móviles desde 1 céntimo por minuto.
http://es.voice.yahoo.com