Where is the Apple documentation for map, flatMap, filter, and reduce?

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Created Sep ’16

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If I google for "collections swift map" the resulting hits are mostly third party explanations (which are great) or Apple pages that do not actually explain map (but reffer to it while explaining something else). If I limit my search to Apple's documentation (e.g. here) I get taken to a number of promissing looking pages but none of them explain the functions. For example the Apple documentation for "Collection Types" contains seven hits when I search the page for "map", but every one of them is from the phrase "maple syrup" (I'm not joking, try it!)

Where is the Apple Swift language documentation for the functions map, flatMap, filter, and reduce?

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ahltorp OP

Sep ’16

map is documented in the Collection protocol documentation: developer.apple.com/reference/swift/collection

filter, flatMap and reduce (and also map) can be found in the Array documentation: developer.apple.com/reference/swift/array

You find all these in the Swift Standard Library documentation at developer.apple.com/reference/swift

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