Modulo that handles negative values properly

moduloNegative.js

const mod = (v, m) => (v + m) % m;

function modulo(m, v) {
  return v == null ? (_v) => mod(_v, m) : mod(v, m);
}

console.log('\nJS mod: -1 % 1000 \t=', -1 % 1000);

console.log('\nmod(-1, 1000) \t\t=', mod(-1, 1000));

console.log('\nmodulo(1000, -1) \t=', modulo(1000, -1));
console.log('modulo(1000)(-1) \t=', modulo(1000)(-1));