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 Ruby: Interators

An interator is a method that invokes a block of code for each element in a hash or array.

Interators are:

• find: passes each element of the collection to the associated block until the block returns 'true'. The corresponding element is then returned.
• each: passes each element of the collection to the associated block.
• collect: passes each element of the collection to the associated block and collects the block's return values in a new array.

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