"Currying" a single object in a one-arg function

objCurry.ts

type Omit<T1, T2> = { [K in Exclude<keyof T1, keyof T2>]: T1[K] };

const curry = <TDeps, TPartialDeps extends Partial<TDeps>, TReturn>(
  fn: (deps: TDeps) => TReturn,
  supplied: TPartialDeps
): ((newDeps: Omit<TDeps, TPartialDeps>) => TReturn) => {
  return (deps: Omit<TDeps, TPartialDeps>) =>
    fn({
      ...supplied,
      ...deps
    } as any);
};

// Example follows

type Deps = {
  x: number;
  y: string;
  z: boolean;
};

const foo = (deps: Deps): string => JSON.stringify(deps);

const curriedFoo = curry(foo, { x: 42, z: false }); // Only apply x and z to the dependencies

const result = curriedFoo({
  y: 'abc' // Now only need to the call the function with the one remaining arg
});

console.log('Curried function call: ', result); // {"x":42,"z":false,"y":"abc"}