Sorry this is probably going to be a real easy question but I am totally
new to programming.
I was following some tutorial online and at the end of the first chapter
it said 'Now create a program that asks the user for a number and then
suggests a higher number as a better option.
So what I wanted to happen below is it takes the users input and just
adds 1 to it. But is is coming back with "rb:3:in '+' can't convert
fixnum into string'
puts 'What is your favourite number?'
number = gets.chomp
number+=1
puts 'Do you not think' + number + 'is a better number?'
Any help would be appreciated its doing my head in.
When you call gets.chomp it returns a string (lets say it's "5"). That looks like a number to you and me but ruby treats it as text. You need to tell ruby to make it a number using .to_i.
ie The second line should read gets.chomp.to_i
Then ruby will be adding 5+1 and not "5"+1. I found that a good way to think of this was to replace "5" with a word or something. Could you do "hello"+1?
Angus
···
On 28/05/10 19:29, Ant Walliams wrote:
Hi there,
Sorry this is probably going to be a real easy question but I am totally
new to programming.
I was following some tutorial online and at the end of the first chapter
it said 'Now create a program that asks the user for a number and then
suggests a higher number as a better option.
So what I wanted to happen below is it takes the users input and just
adds 1 to it. But is is coming back with "rb:3:in '+' can't convert
fixnum into string'
puts 'What is your favourite number?'
number = gets.chomp
number+=1
puts 'Do you not think' + number + 'is a better number?'
Any help would be appreciated its doing my head in.
puts 'What is your favourite number?'
number = gets.chomp
number = number.to_i # converts the number from String to Integer
number+=1
puts 'Do you not think' + number + 'is a better number?'
···
On Sat, 2010-05-29 at 03:29 +0900, Ant Walliams wrote:
Hi there,
Sorry this is probably going to be a real easy question but I am totally
new to programming.
I was following some tutorial online and at the end of the first chapter
it said 'Now create a program that asks the user for a number and then
suggests a higher number as a better option.
So what I wanted to happen below is it takes the users input and just
adds 1 to it. But is is coming back with "rb:3:in '+' can't convert
fixnum into string'
puts 'What is your favourite number?'
number = gets.chomp
number+=1
puts 'Do you not think' + number + 'is a better number?'
Any help would be appreciated its doing my head in.
Hi, i am in Osx and i had installed Ruby 1.8.7. I want to make a
tutorial, i am a beginner in ruby. My problem is that when i want to
execute a program on ruby, example: code.rb, with "ruby code.rb" on
Terminal, like all tutorials sais, a error come back: "-bash: code.rb:
command not found"
Well, there is a part that i am missing. Please help me.
It's ok, you want to run it as a normal command if i understand well. First thing to do, is adding a "shebang"[1] at top of your ruby file. After that, you have to make it executable, and, to do it you have to write on bash command line, chmod +x code.rb and voilà, your ruby script as executable in this way: ./code.rb
Have fun with ruby,
-Francesco
[1] shebang: "/usr/bin/env ruby"
···
Il 29/05/10 21.43, Emma Pidre ha scritto:
Hi, i am in Osx and i had installed Ruby 1.8.7. I want to make a
tutorial, i am a beginner in ruby. My problem is that when i want to
execute a program on ruby, example: code.rb, with "ruby code.rb" on
Terminal, like all tutorials sais, a error come back: "-bash: code.rb:
command not found"
Well, there is a part that i am missing. Please help me.
# add a shebang to the top of a file called hello_world.rb
# this directs the system(?) to use Ruby to interpret the file
$ echo '#!/usr/bin/env ruby' > hello_world.rb
# append a statement that will output "hello world" to hello_world.rb
$ echo 'puts "hello world"' >> hello_world.rb
# set permissions of hello_world.rb so that you can execute it
$ chmod 755 hello_world.rb
# execute hello_world.rb and see that it outputs "hello world"
# the ./ in front is important, it says the file is located in the current
directory
$ ./hello_world.rb
hello world
···
On Sat, May 29, 2010 at 2:43 PM, Emma Pidre <equisigriegazeta@gmail.com>wrote:
Hi, i am in Osx and i had installed Ruby 1.8.7. I want to make a
tutorial, i am a beginner in ruby. My problem is that when i want to
execute a program on ruby, example: code.rb, with "ruby code.rb" on
Terminal, like all tutorials sais, a error come back: "-bash: code.rb:
command not found"
puts "What is your favourite number?"
number = gets.chomp
number+=1
puts "Do you not think #{number.to_s} is a better number?"
Best regards.
···
On Fri, May 28, 2010 at 12:13 PM, J-H Johansen <ondemannen@gmail.com> wrote:
On Fri, May 28, 2010 at 8:59 PM, Ant Walliams > <anthonywainwright@googlemail.com> wrote:
> Reid Thompson wrote:
>> On Sat, May 29, 2010 at 03:29:15AM +0900, Ant Walliams wrote:
>>> Hi there,
>>> puts 'What is your favourite number?'
>>> number = gets.chomp
>>> number+=1
>>> puts 'Do you not think' + number + 'is a better number?'
>> puts 'Do you not think' + number.to_s + 'is a better number?'
>
> Thank for the reply but I am still getting the same error even after
> making your changes. Any ideas?
>
> Thanks
> Ant
> --
> Posted via http://www.ruby-forum.com/\.
>
>
You need to convert the input from String to Fixnum
puts "What is your favourite number?"
number = gets.chomp.to_i
number+=1
puts "Do you not think #{number} is a better number?"
--
Jens-Harald Johansen
--
There are 10 kinds of people in the world: Those who understand binary and
those who don't...
You're right, maybe my answer can get someone confused, to be 100% sure, Josh, let me write a ruby script
ruby_sample.rb:
···
Il 30/05/10 13.20, Josh Cheek ha scritto:
On Sat, May 29, 2010 at 2:43 PM, Emma Pidre<equisigriegazeta@gmail.com>wrote:
Hi, i am in Osx and i had installed Ruby 1.8.7. I want to make a
tutorial, i am a beginner in ruby. My problem is that when i want to
execute a program on ruby, example: code.rb, with "ruby code.rb" on
Terminal, like all tutorials sais, a error come back: "-bash: code.rb:
command not found"
# add a shebang to the top of a file called hello_world.rb
# this directs the system(?) to use Ruby to interpret the file
$ echo '#!/usr/bin/env ruby'> hello_world.rb
# append a statement that will output "hello world" to hello_world.rb
$ echo 'puts "hello world"'>> hello_world.rb
# set permissions of hello_world.rb so that you can execute it
$ chmod 755 hello_world.rb
# execute hello_world.rb and see that it outputs "hello world"
# the ./ in front is important, it says the file is located in the current
directory
$ ./hello_world.rb
hello world
--
#!/usr/bin/env ruby
puts "hello world"
--
and after you've to do what Josh say i mean, 3rd and 4th step.
Hi, trhans for the answer. This is not working. I saw that already had
the first line of code in the example i trying to run : "#!/usr/bin/env
ruby".
The error is the same:
"ruby: No such file or directory -- ./code.rb (LoadError)"
The person who sold me the Macbook, said to me that he made some
troubles with ruby. I don't know what is wrong, maybe is a configuration
troubles or something like that. i can use directly from textMate, but i
want to resolve the problem form Terminal, to be more sure that all work
fine.
there is a way for restart ruby, i mean, unistall o delete all files or
something like that for make a re-install later ? What did you advise
me?
Thanks for all ! im very happy to find i place where find help.
Please follow the instructions above, exactly, and let us know whether the
hello world example works. (ie if it did not work, it should not have said
anything about code.rb)
···
On Sun, May 30, 2010 at 12:01 PM, Emma Pidre <equisigriegazeta@gmail.com>wrote:
Hi, trhans for the answer. This is not working. I saw that already had
the first line of code in the example i trying to run : "#!/usr/bin/env
ruby".
The error is the same:
"ruby: No such file or directory -- ./code.rb (LoadError)"
The person who sold me the Macbook, said to me that he made some
troubles with ruby. I don't know what is wrong, maybe is a configuration
troubles or something like that. i can use directly from textMate, but i
want to resolve the problem form Terminal, to be more sure that all work
fine.
there is a way for restart ruby, i mean, unistall o delete all files or
something like that for make a re-install later ? What did you advise
me?
If you are having difficulty following it, this is what it looks like on my
cmputer:
···
On Sun, May 30, 2010 at 2:53 PM, Josh Cheek <josh.cheek@gmail.com> wrote:
On Sun, May 30, 2010 at 12:01 PM, Emma Pidre <equisigriegazeta@gmail.com>wrote:
Hi, trhans for the answer. This is not working. I saw that already had
the first line of code in the example i trying to run : "#!/usr/bin/env
ruby".
The error is the same:
"ruby: No such file or directory -- ./code.rb (LoadError)"
The person who sold me the Macbook, said to me that he made some
troubles with ruby. I don't know what is wrong, maybe is a configuration
troubles or something like that. i can use directly from textMate, but i
want to resolve the problem form Terminal, to be more sure that all work
fine.
there is a way for restart ruby, i mean, unistall o delete all files or
something like that for make a re-install later ? What did you advise
me?
Please follow the instructions above, exactly, and let us know whether the
hello world example works. (ie if it did not work, it should not have said
anything about code.rb)
im very happy to find i place where find help.