JAVASCRIPT

javascript foreach

const avengers = ['thor', 'captain america', 'hulk'];
avengers.forEach((item, index)=>{
	console.log(index, item)
})

array.foreach

let arr = [1,2,3]

// forEach accepts a function, and each value in array is passed to the 
// function. You define the function as you would any regular
// function, you're just doing it inside the forEach loop
arr.forEach(function(value){
  console.log(value)
})

// you also have access to the index and original array:
arr.forEach(function(value, idx, array){
  console.log(idx, value, array)
})

// it's common for the arrow notation to be used: it's effectively
// the same thing but the function keyword is removed and the syntax is
// a bit different
arr.forEach((value) => {
  console.log(value)
})

Javascript forEach

const products = [
    { name: 'Laptop', price: 32000, brand: 'Lenovo', color: 'Silver' },
    { name: 'Phone', price: 700, brand: 'Iphone', color: 'Golden' },
    { name: 'Watch', price: 3000, brand: 'Casio', color: 'Yellow' },
    { name: 'Aunglass', price: 300, brand: 'Ribon', color: 'Blue' },
    { name: 'Camera', price: 9000, brand: 'Lenovo', color: 'Gray' },
];
products.forEach(product => console.log(product.name));
//Output: Laptop Phone Watch Aunglass Camera

js foreach

var stringArray = ["first", "second"];

myArray.forEach((string, index) => {
  	var msg = "The string: " + string + " is in index of " + index; 
	console.log(msg);
	
	// Output:
	// The string: first is in index of 0
	// The string: second is in index of 1
});

foreach jas

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

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

javascript foreach

let numbers = ['one', 'two', 'three', 'four'];

numbers.forEach((num) => {
  console.log(num);
});  // one   //two //three // four

javascript foreach

var array = ["a","b","c"];
// example 1
  for(var value of array){
    console.log(value);
    value += 1;
  }

// example 2
  array.forEach((item, index)=>{
    console.log(index, item)
  })

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']

foreach js

const arr = ["some", "random", "words"]

arr.forEach((word) => {       // takes callback and returns undefined
	console.log(word)
})

/* will print:
   some
   random
   words    */ 

js forEach method

const numbers = [28, 77, 45, 99, 27];
 
numbers.forEach(number => {  
  console.log(number);
});

javascript foreach

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

javascript forEach

const myArray = ['hello', 1, 'thanks', 5];
myArray.forEach((item, index)=>{
	console.log(index, item)
})

javascript foreach

var arr = [1, 2, 3, 4];

arr.forEach(function(element) {
  console.log(element);
});

javascript foreach

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

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

colors.forEach(iterate);
// logs "blue"
// logs "green"
// logs "white"

javascript foreach

// Arrow function
forEach((element) => { /* ... */ })
forEach((element, index) => { /* ... */ })
forEach((element, index, array) => { /* ... */ })

js foreach

for (let i in arr) {
	console.log(i);
}

js foreach

for (const element of theArray) {
    // ...use `element`...
}

foreach js

angular.forEach(obj1.results, function(result1) {
    angular.forEach(obj2.results, function(result2) {
        if (result1.Value === result2.Value) {
            //do something
        }
    });
});

//exact same with a for loop
for (var i = 0; i < obj1.results.length; i++) {
    for (var j = 0; j < obj2.results.length; j++) {
        if (obj1.results[i].Value === obj2.results[j].Value) {
            //do something
        }
    }
}

js foreach mdn

forEach(function(element) { /* ... */ })
forEach(function(element, index) { /* ... */ })
forEach(function(element, index, array){ /* ... */ })
forEach(function(element, index, array) { /* ... */ }, thisArg)

mdn foreach

arr.forEach(callback(currentValue [, index [, array]])[, thisArg])

javascript foreach

arr.forEach(function callback(currentValue, index, array) {
    // tu iterador
}[, thisArg]);