js array foreach index code example

Example 1: javascript foreach

var colors = ['red', 'blue', 'green'];

colors.forEach(function(color) {
  console.log(color);
});

Example 2: javascript foreach index

users.forEach((user, index)=>{
	console.log(index); // Prints the index at which the loop is currently at
});

Example 3: javascript .foreach

let colors = ['red', 'blue', 'green'];
// idx and sourceArr optional; sourceArr == colors
colors.forEach(function(color, idx, sourceArr) {
	console.log(color, idx, sourceArr)
});
// Output:
// red 0 ['red', 'blue', 'green']
// blue 1 ['red', 'blue', 'green']
// green 2 ['red', 'blue', 'green']

Example 4: forEach index

const array1 = ['a', 'b', 'c'];

array1.forEach((element, index) => console.log(element, index));

Example 5: foreach javascript

let names = ['josh', 'joe', 'ben', 'dylan'];
// index and sourceArr are optional, sourceArr == ['josh', 'joe', 'ben', 'dylan']
names.forEach((name, index, sourceArr) => {
	console.log(color, idx, sourceArr)
});

// josh 0 ['josh', 'joe', 'ben', 'dylan']
// joe 1 ['josh', 'joe', 'ben', 'dylan']
// ben 2 ['josh', 'joe', 'ben', 'dylan']
// dylan 3 ['josh', 'joe', 'ben', 'dylan']