linq interface in typescript.ts

class CreateOperation {
    static OrderBy(getter: (element: any) => any) {
        return function (arr: any[]): any[] {
            return arr.sort((a, b) => getter(a) - getter(b));
        };
    }

    static OrderByDesc(getter: (element: any) => any) {
        return function (arr: any[]): any[] {
            return arr.sort((a, b) => getter(b) - getter(a));
        };
    }

    static Last(): any {
        return function (arr: any[]): any {
            return arr[arr.length - 1];
        };
    }

    static StartFrom(value : any) : Promise<any> {
        return Promise.resolve(value);
    }
}

var arr = [
    { value: 0 },
    { value: 1 },
    { value: 2 },
];

var result = 
    CreateOperation
        .StartFrom(arr)
        .then(CreateOperation.OrderBy(x => x.value))
        .then(CreateOperation.Last())
        ;