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CSV objects in Ruby. What are they exactly?


map works on any object that includes the Enumerable mixin. In order to work with Enumerable, the class needs to provide each - that's the foundation all the other nice methods are built on. Objects of the CSV class fit this pattern, as you can see in the documentation for the class.

(The reason it doesn't push it straight into an array is because it's nice to be able to read the input file line by line rather than having to store the whole thing in memory before doing anything with it.)


Categories : Ruby

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