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comp.lang.ruby

Array Default Values

Drew Olson

1/16/2007 6:27:00 PM

I'd like to have my array behave like this: If I add an item to a[5],
a[0..5] will be equal to " " rather than nil. I tried to following:

irb(main):001:0> a=[" "]
=> [" "]
irb(main):002:0> a[5] = "test"
=> "test"
irb(main):003:0> a.inspect
=> "[\" \", nil, nil, nil, nil, \"test\"]"

Is there any way to have those nils default to " "?

Thanks,
Drew

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2 Answers

David Goodlad

1/16/2007 6:52:00 PM

0

On 1/16/07, Drew Olson <olsonas@gmail.com> wrote:
> I'd like to have my array behave like this: If I add an item to a[5],
> a[0..5] will be equal to " " rather than nil. I tried to following:
>
> irb(main):001:0> a=[" "]
> => [" "]
> irb(main):002:0> a[5] = "test"
> => "test"
> irb(main):003:0> a.inspect
> => "[\" \", nil, nil, nil, nil, \"test\"]"
>
> Is there any way to have those nils default to " "?

Array.new should do what you want:

a = Array.new(5, " ") # => [" ", " ", " ", " ", " "]

Dave

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Dave Goodlad
dgoodlad@gmail.com or dave@goodlad.ca
http://david.g...

Drew Olson

1/16/2007 7:13:00 PM

0

Tamreen Khan wrote:

> It's a bit more code, but also more flexible, filling up everything up
> to
> and not including 5.

I should have specified the follow:

1. I'm golfing, so short length would be preferred.
2. I will not know the length of the array beforehand.

Thanks again :)

-Drew


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