Ruby Map With Index
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Ruby Map With Index
#each_with_index passes not just the current item but whatever position in the array it was located in. Or if you have a list of user objects…. By chaining #with_index, you can get access to the index like before.
However, there are cases when the number of iterations in not known in advance: Simple enough i’ll just use enumerable::map right? #each_with_index passes not just the current item but whatever position in the array it was located in.
A new array containing the values returned by the block.
A new array containing the values returned by the block. For example, the code below uses map to convert an array of small letters into an array of. New_photo_url and new_photo_path map to the path for the new action; Class foo def method_name puts method called for # {object_id} end end [foo.new, foo.new].map do |element| element.method_name end # => method called for 70339841711300 # => method.
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