Strings and ranges

ruby-talk
1

The following program doesn’t execute as I would expect:

#!/usr/bin/ruby

stringy = “X”

1.upto(10) do |i|
puts stringy
stringy.succ!
end

“X”.upto(“AG”) do |ss|
puts ss
end

puts "‘AB’ > ‘AA’ = #{‘AB’ > ‘AA’}"
puts “‘X’ < ‘AA’ = #{‘X’ < ‘AB’}”

The code below gets around my problem…

stringy = "X"
while true
puts stringy
stringy.succ!
break if stringy == "AH"
end

Is there a better way?

-Charlie

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2

Hi –

The following program doesn’t execute as I would expect:

#!/usr/bin/ruby

stringy = “X”

1.upto(10) do |i|
puts stringy
stringy.succ!
end

“X”.upto(“AG”) do |ss|
puts ss
end

puts “‘AB’ > ‘AA’ = #{‘AB’ > ‘AA’}”
puts “‘X’ < ‘AA’ = #{‘X’ < ‘AB’}”

Interesting – just like “9” and “10” (i.e., “9” > “9”.succ).

The code below gets around my problem…

stringy = “X”
while true
puts stringy
stringy.succ!
break if stringy == “AH”
end

Is there a better way?

How about this:

x = “X”
puts (0…10).map { x.succ! .dup }

(You need the .dup or you’ll end up with 10 of x, all the same
string.)

David

···

On Thu, 4 Dec 2003 charlie.mills@milliman.com wrote:

–
David A. Black
dblack@wobblini.net

3

charlie.mills@milliman.com schrieb im Newsbeitrag
news:OF2A486F40.B193A772-ON88256DF1.00657564@milliman.com…

The following program doesn’t execute as I would expect:

#!/usr/bin/ruby

stringy = “X”

1.upto(10) do |i|
puts stringy
stringy.succ!
end

“X”.upto(“AG”) do |ss|
puts ss
end

puts “‘AB’ > ‘AA’ = #{‘AB’ > ‘AA’}”
puts “‘X’ < ‘AA’ = #{‘X’ < ‘AB’}”

The code below gets around my problem…

stringy = “X”
while true
puts stringy
stringy.succ!
break if stringy == “AH”
end

Is there a better way?

stringy = “X”
until stringy == “AH”
puts stringy
stringy.succ!
end

robert