CODE EXAMPLE FOR JAVASCRIPT

javascript callbacks anonymous function

function filter(numbers, callback) {
  let results = [];
  for (const number of numbers) {
    if (callback(number)) {
      results.push(number);
    }
  }
  return results;
}

let numbers = [1, 2, 4, 7, 3, 5, 6];

let oddNumbers = filter(numbers, function (number) {
  return number % 2 != 0;
});

console.log(oddNumbers);
Code language: JavaScript (javascript)