Write a function that takes a function and an argument, and returns a function that can supply a second argument add3 = curry(add,3); add3(4); // 7

exercise_5.js

var add = (function(a) {
  return function(b) {
    return a + b;
  }
});


var mul = (function(a) {
  return function(b) {
    var total = a * b;
    return total;
  }
});

function curry(f, x) {
  return f(x)
}
add3 = curry(add, 3);
console.log(add3(4)); // 7
var a = curry(add, 3)(3); // 6
var b = curry(mul, 5)(6); // 30