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Swift 3, 51

Dependency: Foundation for String(format:_:)

{$0.utf8.map{String(format:"%02d",$0-96)}.joined()} // where $0 is String

Usage:

Test

"codegolf".utf8.map{String(format:"%02d",$0-96)}.joined()

or

{$0.utf8.map{String(format:"%02d",$0-96)}.joined()}("codegolf")"

Swift 3, 51

Dependency: Foundation for String(format:_:)

{$0.utf8.map{String(format:"%02d",$0-96)}.joined()} // where $0 is String

Usage:

Test

"codegolf".utf8.map{String(format:"%02d",$0-96)}.joined()

or

{$0.utf8.map{String(format:"%02d",$0-96)}.joined()}("codegolf")"

Swift 3, 51

Dependency: Foundation for String(format:_:)

{$0.utf8.map{String(format:"%02d",$0-96)}.joined()} // where $0 is String

Usage:

Test

"codegolf".utf8.map{String(format:"%02d",$0-96)}.joined()

or

{$0.utf8.map{String(format:"%02d",$0-96)}.joined()}("codegolf")

deleted 33 characters in body
Source Link

Swift 3, 51

Dependency: Foundation for String(format:_:)

{$0.utf8.map{String(format:"%02d",$0-96)}.joined()} // where $0 is String

Usage:

Test

"codegolf".utf8.map{String(format:"%02d",$0-96)}.joined()

or

let c={(s:String) in s$0.utf8.map{String(format:"%02d",$0-96)}.joined()} //70 byte c("codegolf")"

Swift 3, 51

Dependency: Foundation for String(format:_:)

{$0.utf8.map{String(format:"%02d",$0-96)}.joined()} // where $0 is String

Usage:

Test

"codegolf".utf8.map{String(format:"%02d",$0-96)}.joined()

or

let c={(s:String) in s.utf8.map{String(format:"%02d",$0-96)}.joined()} //70 byte c("codegolf")

Swift 3, 51

Dependency: Foundation for String(format:_:)

{$0.utf8.map{String(format:"%02d",$0-96)}.joined()} // where $0 is String

Usage:

Test

"codegolf".utf8.map{String(format:"%02d",$0-96)}.joined()

or

{$0.utf8.map{String(format:"%02d",$0-96)}.joined()}("codegolf")"

Source Link

Swift 3, 51

Dependency: Foundation for String(format:_:)

{$0.utf8.map{String(format:"%02d",$0-96)}.joined()} // where $0 is String

Usage:

Test

"codegolf".utf8.map{String(format:"%02d",$0-96)}.joined()

or

let c={(s:String) in s.utf8.map{String(format:"%02d",$0-96)}.joined()} //70 byte c("codegolf")