From: Jun Young Kim <jykim@...>
Date: 2009-01-08T20:53:34+09:00
Subject: Re: Can you guess what it will be happened?

thanks for all your replies.

2009. 01. 08, 오후 8:46, Eustáquio Rangel 작성:

> Hi!
>
> 2009/1/8 Jun Young Kim <jykim@altibase.com>:
>> what's the definition of '*'?
>> is this pointer?
>
> It's called "splat operator". You can use it to "explode" your array
> elements or join some variables on an array. Note the difference:
>
> irb(main):001:0> a = [1,2]; b = [3,4]
> => [3, 4]
> irb(main):002:0> a.push(b)
> => [1, 2, [3, 4]]
> irb(main):003:0> a.push(*b)
> => [1, 2, [3, 4], 3, 4]
>
> And now:
>
> irb(main):004:0> def test(*args)
> irb(main):005:1>   p args
> irb(main):006:1>   end
> => nil
> irb(main):007:0> test(1)
> [1]
> => nil
> irb(main):008:0> test(1,2,3)
> [1, 2, 3]
>
> Regards,
>
>