Comparison error

Ruby
1

so i’m writing a program for class that tells the user if the person is
20 or under then they get a green and if the person is 21 or over then
tehy get red here’s the code and error

age = ageText.to_s

if age <= 20
status = “GREEN”
else
status = “RED”
end

C:/ruby/martinilounge.rb:69:in <=': comparison of String with 18 failed from C:/ruby/martinilounge.rb:69 from C:/ruby/martinilounge.rb:98:incall’
from C:/ruby/martinilounge.rb:98:in `main’
from C:/ruby/martinilounge.rb:98

2

On 10-10-19 08:29 PM, Jake Alucard wrote:

   status = "GREEN"
      from C:/ruby/martinilounge.rb:69
      from C:/ruby/martinilounge.rb:98:in `call'
      from C:/ruby/martinilounge.rb:98:in `main'
      from C:/ruby/martinilounge.rb:98

20 is not a string =), possible you want to do the following

age = ageText.to_i

you can also do

age = Integer(ageText)

the 2nd form will throw an ArgumentError exception if ageText is not a
number, while the 1st form will simply return some integer value, you
can play around with the them in irb:

irb(main):001:0> “$55”.to_i
=> 0

irb(main):002:0> “33”.to_i
=> 33

irb(main):003:0> “33rr12”.to_i
=> 33

irb(main):004:0> nil.to_i
=> 0

irb(main):005:0> “rrr”.to_i
=> 0

irb(main):006:0> Integer(“12”)
=> 12

irb(main):007:0> Integer(“$12”)
ArgumentError: invalid value for Integer(): “$12”
from (irb):7:in Integer' from (irb):7 from /usr/local/bin/irb:12:in ’

–
Kind Regards,
Rajinder Y. | DevMentor.org | Do Good! ~ Share Freely

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Kubuntu x86_64 10.10 | KDE 4.5.1
Ruby 1.9.2p0 | Rails 3.0.1

3

Thank you so much :smiley:

4

Rajinder Y. wrote in post #955622:

you can also do

age = Integer(ageText)

the 2nd form will throw an ArgumentError exception if ageText is not a
number

Beware that it also has some other behaviour you might not expect.

Integer(“20”)
=> 20

Integer(“00020”)
=> 16

Integer(“0x00020”)
=> 32

5

On Wed, Oct 20, 2010 at 7:23 AM, Brian C. [email protected]
wrote:

Integer(“20”)
=> 20
Integer(“00020”)
=> 16
Integer(“0x00020”)
=> 32

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Posted via http://www.ruby-forum.com/.

nice thanks for pointing that out =)