I am curious as to the general concensus and reaction to me asking a
question that is most probably almost embarrassing in it's stupidity.
Shall we find out?
Let's say I wanted to convert a bunch of numbers to their ascii values.
Why doesn't this work?
1.upto(9) do |x|
聽聽puts ?#{x}
end
I am in my first few hours of Rubydom so please - pity. Not ridicule!
Thanks in advance...
SM
路路路
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We want to be the friendly news group, so starting out questions are welcome
Why doesn't this work?
1.upto(9) do |x|
puts ?#{x}
end
The #{ } escape is for with quoted strings. You could do something
similar to what you write using and eval; however, I think you would
be better off with:
65.upto(75) { |x| puts x.chr }
Patrick
路路路
On 4/13/05, Simon.Mullis@equinoxsolutions.com <Simon.Mullis@equinoxsolutions.com> wrote:
This doesn't work because "puts ?#{x}" isn't a valid statement. If you change this line to "puts x.chr" it should work. I don't know what you wanted to do with the "?#{x}", so I can't really comment on that...
Well, its cuz you're trying to do string interpolation directly into
ruby code, which can't be done. The interpolation (i.e. #{x}) only
works in strings. Secondly, the ? is a literal form and not a method,
so you can;t pass it arguments. To get the ascii value of a string use
str[n] where n is the index of the character you wish to convert, in
this case 0.
1.upto(9) do |x|
puts "#{x}"[0]
end
BTW, I believe this will change in future verions of Ruby since Ruby
will be gaining more advanced encoding. So instead there will be a
specific method, like String#ascii(n), or something, to do this.
[Correct me if I am misinformed all.] But for now the above is the way.
"Trans" <transfire@gmail.com> schrieb im Newsbeitrag news:1113415954.205046.176340@z14g2000cwz.googlegroups.com...
Hi--
Dont; worry this is a low bite board
Why doesn't this work?
1.upto(9) do |x|
puts ?#{x}
end
Well, its cuz you're trying to do string interpolation directly into
ruby code, which can't be done. The interpolation (i.e. #{x}) only
works in strings. Secondly, the ? is a literal form and not a method,
so you can;t pass it arguments. To get the ascii value of a string use
str[n] where n is the index of the character you wish to convert, in
this case 0.
1.upto(9) do |x|
puts "#{x}"[0]
end
or
1.upto(9) do |x|
puts x.to_s[0]
end
or (with some knowledge of ASCII characterset)
1.upto(9) do |x|
puts ?0 + x
end
BTW, I believe this will change in future verions of Ruby since Ruby
will be gaining more advanced encoding. So instead there will be a
specific method, like String#ascii(n), or something, to do this.
[Correct me if I am misinformed all.] But for now the above is the way.
Yeah probably. But for the time being your solution works.
