tests/cases/compiler/redefineArray.ts(1,1): error TS2322: Type '(n: number, s: string) => number' is not assignable to type 'ArrayConstructor'. Property 'isArray' is missing in type '(n: number, s: string) => number'. ==== tests/cases/compiler/redefineArray.ts (1 errors) ==== Array = function (n:number, s:string) {return n;}; ~~~~~ !!! error TS2322: Type '(n: number, s: string) => number' is not assignable to type 'ArrayConstructor'. !!! error TS2322: Property 'isArray' is missing in type '(n: number, s: string) => number'.