forEach

/* In the following example, colors array has 3 items. Let’s use forEach() to 
log to console every color: */

const colors = ['blue', 'green', 'white'];

function iterate(item) {
  console.log(item);
}

colors.forEach(iterate);
// logs "blue"
// logs "green"
// logs "white"$arr = array(1, 2, 3, 4);
foreach ($arr as &$value) {
    $value = $value * 2;
}foreach (array as $value){ 
  //code to be executed; 
  print("value : $value");
} 

foreach (array as  $key => $value){ 
  //code to be executed; 
  print("key[$key] => $value");
} const avengers = ['thor', 'captain america', 'hulk'];
avengers.forEach((item, index)=>{
	console.log(index, item)
})var colors = ['red', 'blue', 'green'];

colors.forEach(function(color) {
  console.log(color);
});const arraySparse = [1,3,,7]
let numCallbackRuns = 0

arraySparse.forEach((element) => {
  console.log(element)
  numCallbackRuns++
})

console.log("numCallbackRuns: ", numCallbackRuns)

// 1
// 3
// 7
// numCallbackRuns: 3
// comment: as you can see the missing value between 3 and 7 didn't invoke callback function.