forEach index code example

Example 1: es6 forEach

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

array1.forEach((element) => {
  console.log(element)
});

// expected output: "a"
// expected output: "b"
// expected output: "c"

Example 2: foreach javascript

var items = ["item1", "item2", "item3"]
var copie = [];

items.forEach(function(item){
  copie.push(item);
});

Example 3: javascript foreach index

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

Example 4: javascript enumerate with index

const iterable = [...];
for (const [index, elem] in iterable.entries()) {
  f(index, elem);
}

// or
iterable.forEach((elem, index) => {
  f(index, elem);
});

Example 5: 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 6: forEach index

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

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