range index

[Josselin]

is there any dry way to get the index of an element in a range
without converting the range into an array ?

("A".."Z").each do | alpha |
-> puts alpha.index (?) or something like that .... <-
end

 

[dblack]

Hi --

is there any dry way to get the index of an element in a range without
converting the range into an array ?

("A".."Z").each do | alpha |
-> puts alpha.index (?) or something like that .... <-
end

("A".."Z").each_with_index do |alpha,i|
puts i
end


David

--
Q. What is THE Ruby book for Rails developers?
A. RUBY FOR RAILS by David A. Black (http://www.manning.com/black)
(See what readers are saying! http://www.rubypal.com/r4rrevs.pdf)
Q. Where can I get Ruby/Rails on-site training, consulting, coaching?
A. Ruby Power and Light, LLC (http://www.rubypal.com)

 

[Josselin]

Hi --



("A".."Z").each_with_index do |alpha,i|
puts i
end


David

thanks a lot.. another part of my book to read before year end ;-)))
all 'each_ .... ' statements

joss

 

[Robert Klemme]

thanks a lot.. another part of my book to read before year end ;-)))
all 'each_ .... ' statements

Here's another one

irb(main):005:0> require 'enumerator'
=> true
irb(main):010:0> (1..10).to_enumeach_with_index).find {|a,b| a==2}[1]
=> 1

robert