Range index


#1

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


#2

Hi –

On Thu, 28 Dec 2006, Josselin wrote:

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


#3

On 2006-12-28 15:19:43 +0100, removed_email_address@domain.invalid said:

(“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


#4

On 28.12.2006 16:05, Josselin wrote:

->  puts alpha.index  (?)  or something  like that .... <-

all 'each_ … ’ statements

Here’s another one

irb(main):005:0> require ‘enumerator’
=> true
irb(main):010:0> (1…10).to_enum(:each_with_index).find {|a,b| a==2}[1]
=> 1

robert