Swift Closure Shorthand Syntax

swift_closure_shorthand.swift

// Closure Shorthand Syntax
// Rule #1: Full closure syntax
[1,2,3,4,5].map({ (i: Int) -> Int in return i * 3 })

// Rule #2: Inferring types from context
[1,2,3,4,5].map({ i in return i * 3 })

// Rule #3: Implicit Returns from Single Expression Closures
[1,2,3,4,5].map({i in i * 3})

// Rule #4: Shorthand Argument Names
[1,2,3,4,5].map({ $0 * 3 })

// Rule #5: Trailing Closures
[1,2,3,4,5].map() { $0 * 3 }

// Rule #6: Ignoring Parentheses
[1,2,3,4,5].map { $0 * 3 }