Is there a automatic counter variable?

Rails
#1

Does ruby have anything where if I’m going through a do-while loop, or
a “3.times” loop or “for product in products” where there’s a variable
that will tell me which iteration of the loop I’m on? Instead of
havign to declare my own counter = 0 and then increment it each time?

Seems like something Rails would have… I can’t seem to find
anything on it.

Thanks guys.

#2

Does ruby have anything where if I’m going through a do-while loop, or
a “3.times” loop or “for product in products” where there’s a variable
that will tell me which iteration of the loop I’m on? Instead of
havign to declare my own counter = 0 and then increment it each time?

irb(main):001:0> 5.times {|i| puts i }
0
1
2
3
4

irb(main):002:0> [‘one’, ‘two’, ‘three’].each_with_index {|i,e| puts i,
e}
one
0
two
1
three
2

Don’t know if “for product in products” has anything, but you could
always
do “products.each_with_index”.

-philip

#3

sw0rdfish wrote:

something like this?

(2…46).each {|i|
puts “i is now: #{i}”
}

#4

Hey guys…

Looks good, the with_index is the option I was looking for… just
looked so messy having to declare a counter variable in a view…
thanks!

#5

Hi –

On Wed, 15 Aug 2007, sw0rdfish wrote:

Does ruby have anything where if I’m going through a do-while loop, or
a “3.times” loop or “for product in products” where there’s a variable
that will tell me which iteration of the loop I’m on? Instead of
havign to declare my own counter = 0 and then increment it each time?

Seems like something Rails would have… I can’t seem to find
anything on it.

3.times {|i| puts “Iteration #{i}” }

Also:

%w{a b c d e f}.each_with_index {|letter,i|
puts “#{letter} is at index #{i}”
}

David

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