JAVASCRIPT

javascript best way to iterate over array

[1,2,3,4,"df"].forEach((value, index) => console.log(index,value));
output
0 1
1 2
2 3
3 4
4 'df'

Iterate Through an Array with a For Loop

var arr = [10, 9, 8, 7, 6];
for (var i = 0; i < arr.length; i++) {
   console.log(arr[i]);
}

how to loop through an array

int[] numbers = {1,2,3,4,5};
for (int i = 0; i < numbers.length; i++) {
	System.out.println(i);
}

iterate through an array

var arr = [1,2,3,4,5,6,7,8];

// Uses the usual "for" loop to iterate
for(var i= 0, l = arr.length; i< l; i++){
	console.log(arr[i]);
}

console.log("========================");

//Uses forEach to iterate
arr.forEach(function(item,index){
	console.log(item);
});

loop over an array

let fruits = ['Apple', 'Banana'];

fruits.forEach(function(item, index, array) {
  console.log(item, index);
});
// Apple 0
// Banana 1

JS iterate over an array

const beatles = ["paul", "john", "ringo", "george"];

beatles.forEach((beatle) => {
  console.log(beatle.toUpperCase());
});

iterate over array javascript

var txt = "";
var numbers = [45, 4, 9, 16, 25];
numbers.forEach(myFunction);

function myFunction(value, index, array) {
  txt = txt + value + "<br>";
}

JS iterate over an array

const beatles = [ "john", "paul", "ringo", "george"];

beatles.forEach((beatle) => {
  console.log(beatle);
});

Loop through array

String[] cars = {"Volvo", "BMW", "Ford", "Mazda"};
System.out.println(cars[0]);

// Change elements in array
cars[0] = "Opel";
System.out.println(cars[0]);

// Length of array
System.out.println(cars.length);

// Loop through array
for (int i = 0; i < cars.length; i++) {
  System.out.println(cars[i]);
}

Iterating or loop through the elements of an array is with a for loop (for):

var keys = Object.keys(o);   // Get an array of property names for object o
var values = []              // Store matching property values in this array
for(var i = 0; i < keys.length; i++) {  // For each index in the array
    var key = keys[i];                  // Get the key at that index
    values[i] = o[key];                 // Store the value in the values array
}

loop over an array

fruits.forEach(function(item, index, array) {
  console.log(item, index)
})
// Apple 0
// Banana 1

loop through array

#include <iostream>
using namespace std;

int main ()
{
   string texts[] = {"Apple", "Banana", "Orange"};
   for( unsigned int a = 0; a < sizeof(texts); a = a + 1 )
   {
       cout << "value of a: " << texts[a] << endl;
   }

   return 0;
}

Iterate Over an Array,

// Task 1
var dairy = ['cheese', 'sour cream', 'milk', 'yogurt', 'ice cream', 'milkshake'];
function logDairy() {
    for (food of dairy) {
        console.log(food)
    }
}

// Task 2
const animal = {
    canJump: true
};
const bird = Object.create(animal);

bird.canFly = true;

bird.hasFeathers = true;

function birdCan() {
    for (value of Object.keys(bird)) {
        console.log(value + ":" + " " + bird[value])
    }
}
// Task 3
function animalCan() {
    for (props in bird) {
        console.log(`${props}: ${bird[props]}`);
    }
}
logDairy();
birdCan();
animalCan()