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30-seconds-of-code/glossary/Functor.md
Robert Mennell 86a167eb19 Update Functor.md
2018-07-24 10:29:35 -07:00

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### Functor
A Functor is a data type common in functional programming that impliments a method `map`. The `map` method takes a function and applies it to the data in the Functor, returning a new instance of the Functor with the result.
JavaScript `Array`s are an example of the Functor data type.