«

I am brand new to Ruby and I would greatly appreciate any help you guys
can provide!

If this is not the correct place to post them please let me know where I
should post these types of questions.

This very short program is just supposed to take today's date using t =
Time.now and calculating what year the user was born...

Code:
puts "How old are you?"
age = gets.chomp

puts name + " is " + age + " years old."

t = Time.now
born = t.year - age

puts "You were probably born in " + born + "."


Thank you!!!

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

You need to convert the age string to a number. If you're coming from
Perl, you're used to this being done for you magically. Ruby expects
you to do it. Try this...

born = t.year - age.to_i



Ja Bo wrote:
> I am brand new to Ruby and I would greatly appreciate any help you guys
> can provide!
>
> If this is not the correct place to post them please let me know where I
> should post these types of questions.
>
> This very short program is just supposed to take today's date using t =
> Time.now and calculating what year the user was born...
>
> Code:
> puts "How old are you?"
> age = gets.chomp
>
> puts name + " is " + age + " years old."
>
> t = Time.now
> born = t.year - age
>
> puts "You were probably born in " + born + "."
>
>
> Thank you!!!
>
>

Hi --

On Thu, 28 Dec 2006, Ja Bo wrote:

> I am brand new to Ruby and I would greatly appreciate any help you guys
> can provide!
>
> If this is not the correct place to post them please let me know where I
> should post these types of questions.
>
> This very short program is just supposed to take today's date using t =
> Time.now and calculating what year the user was born...
>
> Code:
> puts "How old are you?"
> age = gets.chomp
>
> puts name + " is " + age + " years old."
>
> t = Time.now
> born = t.year - age

The problem there is that t.year is an integer and age is a string.
You need to convert age:

born = t.year - age.to_i # to_i is "to integer"

> puts "You were probably born in " + born + "."

And don't forget you can use string interpolation:

puts "You were probably born in #{born}."

Or even do it all at once:

puts "You were probably born in #{Time.now.year - age.to_i}."




David

--
Q. What is THE Ruby book for Rails developers?
A. RUBY FOR RAILS by David A. Black (http://www.manning.com/black)
(See what readers are saying! http://www.rubypal.com/r4rrevs.pdf)
Q. Where can I get Ruby/Rails on-site training, consulting, coaching?
A. Ruby Power and Light, LLC (http://www.rubypal.com)

Hi --

On Thu, 28 Dec 2006, wrote:

> Hi --
>
> On Thu, 28 Dec 2006, Ja Bo wrote:
>
>> I am brand new to Ruby and I would greatly appreciate any help you guys
>> can provide!
>>
>> If this is not the correct place to post them please let me know where I
>> should post these types of questions.
>>
>> This very short program is just supposed to take today's date using t =
>> Time.now and calculating what year the user was born...
>>
>> Code:
>> puts "How old are you?"
>> age = gets.chomp
>>
>> puts name + " is " + age + " years old."
>>
>> t = Time.now
>> born = t.year - age
>
> The problem there is that t.year is an integer and age is a string.
> You need to convert age:
>
> born = t.year - age.to_i # to_i is "to integer"
>
>> puts "You were probably born in " + born + "."
>
> And don't forget you can use string interpolation:
>
> puts "You were probably born in #{born}."
>
> Or even do it all at once:
>
> puts "You were probably born in #{Time.now.year - age.to_i}."
>
>

And, as the other responses reminded me, if you do it the way you
were, you have to convert born to a string:

puts "You were probably born in " + born.to_s + "."

With string interpolation, you don't; the interpolation automatically
does the conversion.


David

--
Q. What is THE Ruby book for Rails developers?
A. RUBY FOR RAILS by David A. Black (http://www.manning.com/black)
(See what readers are saying! http://www.rubypal.com/r4rrevs.pdf)
Q. Where can I get Ruby/Rails on-site training, consulting, coaching?
A. Ruby Power and Light, LLC (http://www.rubypal.com)

Ja Bo escreveu:
> I am brand new to Ruby and I would greatly appreciate any help you guys
> can provide!
>
> If this is not the correct place to post them please let me know where I
> should post these types of questions.
>
> This very short program is just supposed to take today's date using t =
> Time.now and calculating what year the user was born...
>
> Code:
> puts "How old are you?"
> age = gets.chomp
>
> puts name + " is " + age + " years old."
>
> t = Time.now
> born = t.year - age
>
> puts "You were probably born in " + born + "."
>
>
You already got a lot of help from the Ruby interpreter. For grasping
the meaning of the error message, go to the "Pragmatic Programmer's
Guide" in Standard Types and search about the method #to_i.

HTH

--
Cesar Rabak

You have to make sure that the variable types are correct. Here's a
revised version of your script

name = "My name" # This variable was missing in the original code

puts "How old are you?"
age = gets.chomp # gets are a string by default

puts name + " is " + age + " years old."

t = Time.now
born = t.year-age.to_i # convert age to an integer

puts "You were probably born in " + born.to_s + "." #convert born to a
string

Hope this helps

Luis

Ja Bo wrote:
> I am brand new to Ruby and I would greatly appreciate any help you guys
> can provide!
>
> If this is not the correct place to post them please let me know where I
> should post these types of questions.
>
> This very short program is just supposed to take today's date using t =
> Time.now and calculating what year the user was born...
>
> Code:
> puts "How old are you?"
> age = gets.chomp
>
> puts name + " is " + age + " years old."
>
> t = Time.now
> born = t.year - age
>
> puts "You were probably born in " + born + "."
>
>
> Thank you!!!
>
> --
> Posted via http://www.ruby-forum.com/.

Thank you very much for all of your help!!!

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

Ja Bo wrote:
> Thank you very much for all of your help!!!
>
> --
> Posted via http://www.ruby-forum.com/.

And if you don't have a hard copy of the Pick Axe book you can access a
soft copy here:

http://www.rubycentral.com/book/index.html

Although I highly recommend you purchase the second edition

Ken