=== tests/cases/compiler/genericFunctions2.ts ===
declare function map <T, U > (items: T[], f: (x: T) => U): U[];
>map : <T, U>(items: T[], f: (x: T) => U) => U[]
>T : T
>U : U
>items : T[]
>T : T
>f : (x: T) => U
>x : T
>T : T
>U : U
>U : U

var myItems: string[];
>myItems : string[]

var lengths = map(myItems, x => x.length);
>lengths : number[]
>map(myItems, x => x.length) : number[]
>map : <T, U>(items: T[], f: (x: T) => U) => U[]
>myItems : string[]
>x => x.length : (x: string) => number
>x : string
>x.length : number
>x : string
>length : number