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.

[CODE=ruby]for index in 'A'..'Z' do
puts index[0]
end[/CODE]

[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.

[CODE=ruby]for index in 'A'..'Z' do
puts index[0]
end[/CODE]

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.

[CODE=ruby]for index in 'A'..'Z' do
puts eval("?#{index} ")
end[/CODE]
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]

[CODE=ruby]for index in 'A'..'Z' do
puts eval("?#{index} ")
end[/CODE]

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

[CODE=ruby]('A'..'Z').each do |x|
puts x[0]
end[/CODE]

[improvcornartist]

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

[CODE=ruby]('A'..'Z').each do |x|
puts x[0]
end[/CODE]

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.