Adrian Matei for Codever

Posted on Aug 11, 2021 • Updated on Jan 10, 2023 • Originally published at codever.dev

Higher order functions and closures example in Javascript

#javascript #codever #snippets

First with "normal" functions:

//closures and higher order function
function salute(salutation) {
  return function(firstName) {
    return function(lastName) {
      console.log(`hi ${salutation} ${firstName} ${lastName}`)
    }
  }
}

salute('Mr.')('John')('Wick')

//output
hi Mr. John Wick

The shorter variant with arrow functions:

const saluteArrowFunction = (salutation) => (firstName) => (lastName) => console.log(`hi ${salutation} ${firstName} ${lastName}`);

saluteArrowFunction ('Mr.')('Johnny')('Cage')

//output
hi Mr. Johnny Cage