On Thursday 15 June 2006 20:42, you wrote:
> On 6/15/06, Graham Smith <[EMAIL PROTECTED]> wrote:
> > Here are my solutions to the exercises
> >
> > #!/usr/bin/ruby
> > a=[]
> > 20.times { x = rand(100) + 1; a << x }
> > puts a.select { |v| v if v % 2 == 1 }
>
> nice
>
> > - Read all lines from standard input, then print them out in a random
> >
> > > order. (Hint: Array#sort_by) (Extra hint: There's more to the IO class
> > > than each_line -- there are also methods to read lines)
> >
> > #!/usr/bin/ruby
> > a=STDIN.readlines.sort_by {rand}
> > puts a
>
> any reason why you chose STDIN
The reason I used STDIN was it complies with the exercise. Also for testing it
is easy to pipe someting to the file to test with, as I hate typing. e.g if
the above code is in a file called rand_array.rb you can do
ls -l ~ | rand_array.rb
will give you a randomised listing of your home directory
STDIN is the constant for the predefined variable $stdin although you could
use $< but I believe it is not very descriptive and difficult to read in a
whole lot of code, unless you know all the symbols and their meanings off by
heart..
--
Regards,
Graham Smith
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