flatMap is now (partly) compactMap() 관련

HACKING WITH SWIFT

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What's new in Swift?

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flatMap is now (partly) compactMap() | Changes in Swift 4.1

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flatMap is now (partly) compactMap()

Available from Swift 4.1

Other Changes in Swift 4.1

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이찬희 (MarkiiimarK)

Never Stop Learning.