Array.prototype.forEach.js

// Example 1 - Using a for loop

var i = 0,
	records = ['foo', 'bar', 'baz'],
	arrayLength = records.length;

for (; i < arrayLength; i++) {
	console.log(`(${i}) The record is: ${records[i]}`);
}

// Example 2 - Using the forEach method

var records = ['foo', 'bar', 'baz'];

// anonymous function
records.forEach(function (record) {
  console.log(`(1) The record is: ${record}`);
});

// Example 3 - Using a fat arrow function
records.forEach(record => {
  console.log(`(2) The record is: ${record}`);
});

// Example 4 - fat arrow function -> function declaration
records.forEach(record => processRecord(record));

function processRecord (record) {
  console.log(`(3) The record is: ${record}`);
}

// Example 5 - Using an anonymous function
records.forEach(function (record, index, originalArray, thisArg) {
  console.log(`(1) The record is: ${record}`);
});

// Example 6 - fat arrow function
records.forEach((record, index, originalArray) => {
  console.log(`(2) The record is: ${record}`);
});

// Example 7 - fat arrow function -> function declaration
records.forEach((record, index, originalArray)  => processRecord(record, index, originalArray, ));

function processRecord (record, index, originalArray) {
  console.log(`(3) The record is: ${record}`);
}