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//function currying whereby you use bind to permanently set a
// variables value


function multiply(a,b) {
  return a*b;
}

//create a copy of function multiply & bind it to this and the 1st param

var multiplyByTwo = multiply.bind(this, 2);
var muliplyByFive = multiply.bind(this, 5);

var muliplyFiveByTwo = multiply.bind(5, 2);

console.log(multiplyByTwo(8));