AppleCEO · June 13, 2019 12:19
diff --git a/optionalIsMonad.swift b/optionalIsMonad.swift
 let optional:Optional = 1

 let optionalReturned = optional.map({ (number: Int) -> Int in
    let result = 2 * number
    return result
 }).map({ (number: Int) -> Int in
    let result = number / 2
    return result
 })

 optional == optionalReturned
	let optional:Optional = 1

	let optionalReturned = optional.map({ (number: Int) -> Int in
	let result = 2 * number
	return result
	}).map({ (number: Int) -> Int in
	let result = number / 2
	return result
	})

	optional == optionalReturned
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