ES6 curry, with normal function behavior

gistfile1.txt

const curry = f => {
  const _curry = (args = []) => args.length < f.length ? (...a) => _curry([...args, ...a]) : f(...args)
  return _curry()
}

You can use the curried function either like a partial function add(2)(3) or normal function add(2, 3)

Example:

const add = curry((a,b) => a+b)

console.log( add(1)(2) ); // >_ 3
console.log( add(1, 2) ); // >_ 3

//Increment every item from array
console.log( [1,2,3,4,5,6].map(add(1)) );

Dependency injection:

const _getUser = curry((dbConn, id) => dbConn.query(`SELECT * FROM users where users.id = ${id}`))

/*======================================*/
// No need to provide every time the connection in our environment
const getUser = _getUser(EVN.db.getConn)

console.log( _getUser(EVN.db.getConn, 12) );
console.log( getUser(12) );