Assalamualaikum, hello guys welcome back to my blog, and this article explaining about CRUD (create, read, update, delete) in javascript, let’s me show how this code can running

1. Item List

This project about item list, look this code

let itemList = [
{code: "BRG001", name: "shoap",      price:"5000",  qty: 10},
{code: "BRG002", name: "shampo",     price:"12000", qty: 5},
{code: "BRG003", name: "toothpaste", price: "8000", qty: 7}
];

This code a array object that stores the item list data

2. CRUD Item List Data

Before we crud data we need code for find index for array object : item list data

function findIndexByCode(list, code){
    return list.findIndex(
        (b) => b.code.toLowerCase() === code.toLowerCase()
    );
};

2.1 Create New Data for Item List

we will create 3 new data:

//hard code (for you don't have duplicated)
if(findIndexByCode(itemList, "BRG004") === -1){
    itemList.push({code: "BRG004", name: "tissue",    price: "6000",  qty: 20})
}
//or simple code
itemList.push({code: "BRG004", name: "tissue",    price: "6000",  qty: 20});
itemList.push({code: "BRG005", name: "brush",     price: "7000",  qty: 12});
itemList.push({code: "BRG006", name: "detergent", price: "15000", qty: 9});

2.2 Update Data for Item List

we will update some data in item list

const id_shampo = itemList.findIndex(b => b.code === "BRG002")
    itemList[id_shampo].price = "12500"
    itemList[id_shampo].qty = 6

const id_tissue = itemList.findIndex(b => b.code === "BRG004")
    itemList[id_tissue].price = "12500"
    itemList[id_tissue].qty = 6

2.3 Delete Data for Item List

we will delete 1 data for item list

const indexToothPaste = itemList.indexOf(2);
if(indexToothPaste === -1){
itemList.splice(indexToothPaste, 1)
}

2.4 Read Data for Item List

we wiil create table from item list data

console.log("no  |kode   | nama         | harga      |qty  ")
itemList.forEach((b, i) => {
const no = string(i + 1).padStart(3, "0");
const code = b.code.padEnd(5, " ");
const name = b.name.padEnd(12, " ");
const harga = string(b.harga).padStart(9, " ");
const qty = string(b.qty).padStart(3, " ");
console.log(`${no} | ${code} | ${name} | ${price} | ${qty} `);
});

2.5 Result Data

3. Closing

see you next time guys, good bye