javascript foreach
const avengers = ['thor', 'captain america', 'hulk'];
avengers.forEach((item, index)=>{
console.log(index, item)
})
connect.sonveer
const avengers = ['thor', 'captain america', 'hulk'];
avengers.forEach((item, index)=>{
console.log(index, item)
})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.const arr = ['cat', 'dog', 'fish'];
arr.forEach(element => {
console.log(element);
});array.foreach((item)=>{
console.log(item);
});const { chromium } = require("playwright");
const fs = require("fs");
(async () => {
const browser = await chromium.launch();
const page = await browser.newPage();
await page.goto("https://danube-webshop.herokuapp.com");
const content = await page.evaluate(() => {
let data = [];
let books = document.querySelectorAll(".preview");
books.forEach((book) => {
let title = book.querySelector(".preview-title").innerText;
let author = book.querySelector(".preview-author").innerText;
let price = book.querySelector(".preview-price").innerText;
data.push({
title,
author,
price,
});
});
return data;
});
const jsonData = JSON.stringify(content);
fs.writeFileSync("books.json", jsonData);
await browser.close();
})();let data = ["A", "B", "C", "D"];
function process(element)
{
console.log(element);
}
// With named Function
data.forEach(process);
// With Lambda/anonymous Function
data.forEach((element) => console.log(element));