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Clayton

Mon Feb 19, 2007 10:59 am


Random integers

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How would you manage this? I've been playing around in irb, and found rand(max), but I'd like to be able to have a defined range of numbers to randomize... Is there a pre-defined random integers method that does this, or would I have to create my own and seed it with the time or some such this?


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Cervantes

Mon Feb 19, 2007 2:14 pm


RE:Random integers

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You mean something like Rand.Int in Turing, where you provide a lower bound and a higher bound? Sure:


def rand_range(low, high)
    rand(high - low) + low
end



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Clayton

Mon Feb 19, 2007 4:37 pm


Re: Random integers

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hmm, I was thinking of something exactly like that, but I thought I had seen something wrong with it, and now that I think about it, I can't even remember what that was. Thanks Cervantes :D


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wtd

Mon Feb 19, 2007 11:25 pm


RE:Random integers

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irb(main):012:0> class Range
irb(main):013:1>    def random_choice
irb(main):014:2>       rand(last - first) + first
irb(main):015:2>    end
irb(main):016:1> end
=> nil
irb(main):017:0> (1..10).random_choice
=> 8
irb(main):018:0> (1..10).random_choice
=> 8
irb(main):019:0> (1..10).random_choice
=> 9
irb(main):020:0> (1..10).random_choice
=> 1
irb(main):021:0> (1..10).random_choice
=> 5
irb(main):022:0>


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Clayton

Mon Feb 19, 2007 11:38 pm


Re: Random integers

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Well, I've learned my bit of Ruby for the day. I had no idea there was a Range class. that's damn handy :D thanks wtd.