JavaScript tips to backend programmers Part I

Some programmers find it hard to handle objects in javascript. So I made a pseudo-tutorial about tips and tricks for object handling.

Object making

First, Object making in javascript is easy and simple.

Static object making

The static object creation is described as follows:

const object = {
    key_1: "value_1",
    key_2: "value_2",
};

Dynamic object making

But, Some programmers prefer to use this dynamic object creation to avoid writing curly braces:

const object = {};
object.key_1 = "value_1";
object.key_2 = "value_2";

Object manipulation in javascript

In javascript, we can manipulate objects in any possible way, let's suppose I want to display in the console the keys of a certain object separately in an array data structure. we can use the Object.keys(myObject) function and it will output an array with the object keys.

Here is an example:

const myObject = {
  name: "John",
  age: 30,
  city: "New York"
};

const keys = Object.keys(myObject);
console.log(keys); // logs ["name", "age", "city"]

Also, object values in javascript can be separately shown in the console using the Object.values(myObject) function.

const myObject = {
  name: "John",
  age: 30,
  city: "New York"
};

const values = Object.values(myObject);
console.log(values); // logs ["John", 30, "New York"]

Now let's say we want to obtain both the values and the keys in the console but in a different data structure, and this can be done thanks to a function called Object.entries(myObject):

const entries = Object.entries(myObject);
console.log(entries); // logs [["name", "John"], ["age", 30], ["city", "New York"]]