Partial application in Javascript

In JavaScript, partial application can be achieved using techniques like function binding, closures, or the bind method. Here are a few examples:

1. Using Function Binding:

   function add(a, b) {
     return a + b;
   }
   
   // Partially applying the add function
   const add5 = add.bind(null, 5);
   
   // Using the partially applied function
   const result = add5(3); // Result is 8
   
   console.log(result);

2. Using Closures:

   function multiply(a) {
     return function(b) {
       return a * b;
     };
   }
   
   // Partially applying the multiply function
   const multiplyBy2 = multiply(2);
   
   // Using the partially applied function
   const result = multiplyBy2(4); // Result is 8
   
   console.log(result);

3. Using Arrow Functions:

   function divide(a, b) {
     return a / b;
   }
   
   // Partially applying the divide function using arrow function
   const divideBy2 = (b) => divide(2, b);
   
   // Using the partially applied function
   const result = divideBy2(4); // Result is 2
   
   console.log(result);

   All three examples demonstrate partial application by fixing one or more arguments of a function, resulting in a new function with fewer parameters that can be used later. Choose the approach that fits your use case and coding style.