def enumerate(arr): (0..arr.length - 1).to_a.zip(arr)
Is something built in for this? It doesn’t need to have it’s members immutable, it just needs to be in the standard library. I don’t want to be the guy who subclasses the Array class to add a Python feature to a project.
Does it have a different name in Ruby?
%w(a b c).enumerate => [[0, "a"], [1, "b"], [2, "c"], [3, "d"]]
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Answer
Something like this in Python:
a = ['do', 're', 'mi', 'fa'] for i, s in enumerate(a): print('%s at index %d' % (s, i))
becomes this in Ruby:
a = %w(do re mi fa) a.each_with_index do |s,i| puts "#{s} at index #{i}" end