Possible to access the index in a Hash each loop?

ruby enumerable
Upgradingdave picture Upgradingdave · Jan 18, 2010 · Viewed 65.2k times · Source

I'm probably missing something obvious, but is there a way to access the index/count of the iteration inside a hash each loop?

hash = {'three' => 'one', 'four' => 'two', 'one' => 'three'}
hash.each { |key, value| 
    # any way to know which iteration this is
    #   (without having to create a count variable)?
}

Answer

YOU picture YOU · Jan 18, 2010

If you like to know Index of each iteration you could use .each_with_index 

hash.each_with_index { |(key,value),index| ... }

Related questions

How to find a min/max with Ruby

I want to use min(5,10), or Math.max(4,7). Are there functions to this effect in Ruby?

Read More
Array#each vs. Array#map

hash = { "d" => [11, 22], "f" => [33, 44, 55] } # case 1 hash.map {|k,vs| vs.map {|v| "#{k}:#{v}"}}.join(",") => "d:11,d:22,f:33,f:44,f:55" # case 2 hash.map {|k,vs| vs.each {|v| "#{k}:#{v}"}}.join(",") => "11,22,33,44,55" only difference is case 1 uses vs.…

Read More
How do you sort an array alphabetically using sort_by in ruby?

I have an array of memberships. In each membership is a group. I need to sort this array of memberships by the name of the group. I've tried a bunch of different ways, and the latest way is this: @memberships.…

Read More