.gcd method in ruby 1.8.7

in my code i use .gcd method to find greatest common divisor of two int.

like i= 12.gcd 44
puts i

but it says “not defined method”

hazal Ates wrote:

in my code i use .gcd method to find greatest common divisor of two int.

like i= 12.gcd 44
puts i

but it says “not defined method”

note : its not work in irb , too.

On Wednesday 08 September 2010, hazal Ates wrote:

|in my code i use .gcd method to find greatest common divisor of two int.
|
|like i= 12.gcd 44
|puts i
|
|but it says “not defined method”

Without the “like” before i= (which I assume doesn’t belong to your
program
since it produces a syntax error) your code works correctly for me with
ruby
1.8.7-p302.

Stefano

On Wednesday 08 September 2010, hazal Ates wrote:

|> Without the “like” before i= (which I assume doesn’t belong to your
|NoMethodError: undefined method `gcd’ for 12:Fixnum
| from (irb):1
| from :0

You’re right. In ruby 1.8.7 the gcd method is defined in rational.rb,
which is
part of the standard library. To make your program work you simply have
to
require it. The reason it worked for me is that this file is
automatically
required on my system when starting irb.

I hope this helps

Stefano

Stefano C. wrote:

On Wednesday 08 September 2010, hazal Ates wrote:

|in my code i use .gcd method to find greatest common divisor of two int.
|
|like i= 12.gcd 44
|puts i
|
|but it says “not defined method”

Without the “like” before i= (which I assume doesn’t belong to your
program
since it produces a syntax error) your code works correctly for me with
ruby
1.8.7-p302.

Stefano

thank you, but of course i wrote the code without “like”.
irb output as below ;
irb(main):001:0> 12.gcd 44
NoMethodError: undefined method `gcd’ for 12:Fixnum
from (irb):1
from :0

You’re right. In ruby 1.8.7 the gcd method is defined in rational.rb,
which is
part of the standard library. To make your program work you simply have
to
require it. The reason it worked for me is that this file is
automatically
required on my system when starting irb.

I hope this helps

Stefano

thanks but now another problem :

when i wrote : Rational ( 26,65 ) it gives syntax error :frowning:

ruby ratio.rb
ratio.rb:1: syntax error, unexpected ‘,’, expecting ‘)’
Rational (6 , 10)
^
Exit code: 1

normally it must give : (2/5)

thanks but now another problem :

when i wrote : Rational ( 26,65 ) it gives syntax error :frowning:

ruby ratio.rb
ratio.rb:1: syntax error, unexpected ‘,’, expecting ‘)’
Rational (6 , 10)
^
Exit code: 1

normally it must give : (2/5)

ok i just solve it by writing like :

Rational (26),(65) -------> 2/5

On Thursday 09 September 2010, hazal Ates wrote:

|> Stefano
|
|>Exit code: 1
|
|normally it must give : (2/5)

This is strange. It works for me. An attempt I’d do is to remove the
space
between Rational and the parentheses. Ruby behaviour when you put a
space
before a parentheses can be unintuitive (if calling ruby with the -w
switch,
it should give a warning about it).

Stefano

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Am 09.09.2010 14:43, schrieb Stefano C.:

|>
| ^
Stefano

[email protected]:~$ irb
irb(main):001:0> RUBY_DESCRIPTION
=> “ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-linux]”
irb(main):002:0> Rational (6 , 10)
SyntaxError: (irb):2: syntax error, unexpected ‘,’, expecting ‘)’
Rational (6 , 10)
^
from /opt/rubies/ruby-1.9.2-p0/bin/irb:12:in `’
irb(main):003:0> exit
[email protected]:~$ irb18 -rrational
irb(main):001:0> RUBY_DESCRIPTION
=> “ruby 1.8.7 (2010-06-23 patchlevel 299) [x86_64-linux]”
irb(main):002:0> Rational (6, 10)
(irb):2: warning: don’t put space before argument parentheses
=> Rational(3, 5)
irb(main):003:0> exit
[email protected]:~$

Vale,
Marvin
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