# Ruby Puzzle Challenge

Write a Ruby program that prints out the numbers 1 to 100, one number
per line. The program must be less than 10 characters long.

Good luck!
Wyatt G.

On Jan 30, 9:14 pm, Wyatt G. [email protected] wrote:

Write a Ruby program that prints out the numbers 1 to 100, one number
per line. The program must be less than 10 characters long.

Good luck!
Wyatt G.

Well, just for the crack…

p *1…100

Wyatt G. wrote:

Write a Ruby program that prints out the numbers 1 to 100, one number
per line. The program must be less than 10 characters long.

Does this have some kind of spoiler-period like the ruby quiz? Well,
since it
didn’t say so in the OP and anyone who wants to solve it on his own can
just
not read the replies until he’s done, here it goes:

p *1…100
or one char shorter:
p *1…?d

I was thinking of p *1…100

I’m am truly amazed that this could be squeezed down even further to p
*1…?d

That leads me to wonder…is it possible to squeeze this program down
into 7 characters?

On Jan 30, 4:27 pm, Sebastian H. [email protected]

On [Thu, 31.01.2008 06:24], Lee J. wrote:

p *1…100

Would you be so gentle and explain this piece of code to me?
I know things like p “a”*10, but I dont really understand your code.
I know that 1…100 describes a range, but… isn’t * a binary operator?
I don’t really see the first/second operand

Dominik H. wrote:

p *1…100

Would you be so gentle and explain this piece of code to me?
[…] isn’t * a binary operator? I

• can be a binary operator, yes, but here it is the unary, prefix
splat-operator which takes an array or any object that responds to
to_a and turns it into a list of arguments:
foo(*[:la,:li,:lu]) becomes foo(:la,:li,:lu)
p *1…5 becomes p 1,2,3,4,5

HTH,
Sebastian

On [Thu, 31.01.2008 06:42], Sebastian H. wrote:

foo(*[:la,:li,:lu]) becomes foo(:la,:li,:lu)
p *1…5 becomes p 1,2,3,4,5

## HTH, Sebastian

Jabber: [email protected]
ICQ: 205544826

Ah, yeah of course… I totally forgot about that.
Actually, I’m using this feature a lot in my codes. But didn’t know it
takes any object,
which responds to #to_a

Thank you

(Okay, I forgot, that puts can take multiple arguments, too. Sometimes,
Ruby is just too easy)

This is the problem with writing “clever” code…it’s unreadable!

The * operator used here is a unary operator that is used to convert
an array into a list of arguments. For example, say you had this
method:

def say(a, b, c)
puts a
puts b
puts c
end

arr = [1, 2, 3]

As a convenience, Ruby lets you pass each element of the array as a
separate argument into the method by using the * operator:

say(*arr)

In the case of p *1…100, the trick seems to work for a range, too.

On Jan 30, 9:36 pm, Dominik H. [email protected] wrote:

Would you be so gentle and explain this piece of code to me?
I know things like p “a”*10, but I dont really understand your code.
I know that 1…100 describes a range, but… isn’t * a binary operator? I don’t really see the first/second operand

Looks like Sebastian H. explained it before I could get
there. At least I got my post in second before him, hehe…
Well said, Sebastian.

Regards,
Lee

On Jan 30, 6:01 pm, Lionel B. [email protected]
wrote:

must all be printed out on the output but not one on each line.

Still stuck with 8 chars :-/ I can’t think of any other string or
numeric operator which can generate lots of data to print with little
input right now.

Lionel

Wow, that’s pretty creative, though!

Wyatt G. wrote:

I was thinking of p *1…100

I’m am truly amazed that this could be squeezed down even further to p
*1…?d

That leads me to wonder…is it possible to squeeze this program down
into 7 characters?

I tried another approach by relaxing your conditions a bit : the number
must all be printed out on the output but not one on each line.

p 2**975

works

ie the “output” verifies :
!(1…100).any? { |v| output !~ /#{v}/ }

Unfortunately there’s no x**y solution to this condition where x and y
use less that 4 characters.

Still stuck with 8 chars :-/ I can’t think of any other string or
numeric operator which can generate lots of data to print with little
input right now.

Lionel

On Jan 30, 2008 1:35 PM, Wyatt G. [email protected] wrote:

I was thinking of p *1…100

I’m am truly amazed that this could be squeezed down even further to p
*1…?d

That leads me to wonder…is it possible to squeeze this program down
into 7 characters?

ruby -p -e ‘’ < numbers

The ruby program is zero characters. You just have to set up the

Judson

Wyatt G. wrote:

Write a Ruby program that prints out the numbers 1 to 100, one number
per line. The program must be less than 10 characters long.

Good luck!
Wyatt G.

For more golf fun see: http://codegolf.com

On Jan 30, 2008, at 4:14 PM, Wyatt G. wrote:

Write a Ruby program that prints out the numbers 1 to 100, one number
per line. The program must be less than 10 characters long.

p *1…100