Displaying ASCII values

[vermarajeev]

Hello All,
How do I display ASCII values from A..Z?
I tried the following but get some compiler error:

def DisplayAscii()
    for index in 'A'..'Z' do
        puts ?index
    end    
end

Please help...

[improvcornartist]

The ? only looks at the next character, i, so the remaining 'ndex' causes an error. I'm not sure how to use ? to get what you want, but using a string element reference would work.

for index in 'A'..'Z' do
  puts index[0]
end

[vermarajeev]

The ? only looks at the next character, i, so the remaining 'ndex' causes an error. I'm not sure how to use ? to get what you want, but using a string element reference would work.

for index in 'A'..'Z' do
  puts index[0]
end

But I need to use '?' to display the ASCII values of the characters.

[improvcornartist]

Is this homework? What else are you allowed to use? Eval would work.

[vermarajeev]

Is this homework? What else are you allowed to use? Eval would work.

Homework, absolutely no. Why do you think that could be a homework? I come from a C++ background and learning Ruby. The best way to learn any language is to play with it. I want to know how do I display the ASCII value of a char using the '?'. By the way how do you declare a character in Ruby?

[improvcornartist]

I only thought it could possibly be homework because you said you "need to use '?'". The loop I gave you would do the same thing - it would list the ASCII values. Since you rejected it and said you needed to use '?' I thought it may be a homework requirement or something. In any case, iterating a loop like you tried doesn't work because of the way '?' is defined. However, if you use eval, you can use an index and then evaluate the expression.

for index in 'A'..'Z' do
  puts eval("?#{index}")
end

This will fill in the index, then get the ? value of that index. For defining a character, I don't think Ruby actually has a character class. So you would probably use the same method as you would for a string, char = 'A'. I'm still fairly new to Ruby myself, so I don't know if there's a better way to do characters. If so, I haven't found it.

[KOTP]

for index in 'A'..'Z' do
  puts eval("?#{index}")
end

Without using eval you can simply do this, if you want to simply puts the ascii for A - Z

('A'..'Z').each do |x|
  puts x[0]
end

[improvcornartist]

Without using eval you can simply do this, if you want to simply puts the ascii for A - Z

('A'..'Z').each do |x|
  puts x[0]
end

You are correct, using x[0] works. That was actually my solution in post #2. But the original poster wanted to use the '?', which is why I used eval.