Custom forEach prototype

array-prototype-foreach.js

// Create our custom forEach function and attach it to the prototype
Array.prototype.customForEach = function(callback) {
  const arr = this;
  
  for(let i = 0; i < arr.length; i++) {
    callback(arr[i], i, arr);
  }
}

// Execute our custom forEach function
const beachArr = ['waves', 'sharks', 'jellies', 'sand', 'pelicans'];
beachArr.customForEach((item, i, arr) => {
  console.log(`
    Current array element: ${item} \n
    Current array index: ${i} \n
    The whole array: ${arr} \n
  `);
});