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Categorise a list
Given the list 
ruby
Submit a new solution for ruby
There are 15 other solutions in additional languages (cpp, csharp, erlang, fsharp ...)
[one, two, three, four, five] produce a map {3:[one, two], 4:[four, five], 5:[three]} which sorts elements into map entries based on their length
lengths = {}
list.each do |x|
len = x.size
lengths[len] = (lengths[len] || [])
lengths[len] << x
end
list.each do |x|
len = x.size
lengths[len] = (lengths[len] || [])
lengths[len] << x
end
Submit a new solution for ruby
There are 15 other solutions in additional languages (cpp, csharp, erlang, fsharp ...)
