Ruby Puzzle Challenge

[Wyatt Greene]

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 Greene

 

[Lee Jarvis]

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 Greene

Lol whats this all about?

Well, just for the crack..

p *1..100

 

[Sebastian Hungerecker]

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

 

[Wyatt Greene]

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?

 

[Dominik Honnef]

Lol whats this all about?

Well, just for the crack..

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

 

[Sebastian Hungerecker]

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 foola,:li,:lu)
p *1..5 becomes p 1,2,3,4,5


HTH,
Sebastian

 

[Wyatt Greene]

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

If you had this array:

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.

 

[Dominik Honnef]

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 foola,:li,:lu)
p *1..5 becomes p 1,2,3,4,5


HTH,
Sebastian

Ah, yeah of course... I totally forgot about that.
If it had been puts(*[1,2,3...]) I wouldnt have asked that question :/
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)

 

[Lee Jarvis]

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

Regards,
Lee

 

[Lionel Bouton]

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

 

[Wyatt Greene]

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

Wow, that's pretty creative, though!

 

[Judson Lester]

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?

How about 0 characters?

ruby -p -e '' < numbers

The ruby program is zero characters. You just have to set up the
'numbers' file ahead of time.

Judson

 

[Drew Olson]

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 Greene

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

 

[fedzor]

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

Tadah!
I had to think about it for moment, though