Base64 Encoding/Decoding in JavaScript

Onur Palaz — Sun, 04 Aug 2024 07:10:14 +0000

Base64 is a reversible algorithm that allows us to transform binary data into a string of characters vice versa. For example, if we want to transfer some binary data across a network, Base64 encoding might be a good fit.

Base64 is commonly used to encode images, font files, audio-video files etc. It is also widely used for sending e-mail attachments as well. Since it’s a reversible algorithm when we get a Base64 encoded file we can decode it to have the original one.

On the other hand, Base64 is not an encryption algorithm and it should not be used to hash passwords or sensitive data. For that reason, Base64 encoding should be used wisely.

Removing object properties from nested array of objects in JavaScript

Onur Palaz — Sun, 04 Aug 2024 06:49:40 +0000

Removing specific properties from an object can be tricky sometimes, especially if we’d like to remove couple of properties from nested array of objects might be trickier. Here is a solution for that.

Lets say we have an array of objects like here in below;

const cars = [
  { brand: "Toyota", model: "Corolla", year: 2021, color: "Midnight Blue" },
  { brand: "Ford", model: "Escape", year: 2019, color: "Metallic Gray" },
  { brand: "Volkswagen", model: "Golf", year: 2008, color: "Rose Red" },
  { brand: "Honda", model: "Civic", year: 2020, color: "Starlight" },
]

If we’d like to remove the year and color properties from all objects that are nested in our cars array, here is the quick solution,

const newCars = cars.map(({ year, color, ...rest }) => rest)

Let’s also log our new array into the console

console.log(newCars)

Final result will be;

[
  {
    brand: "Toyota",
    model: "Corolla",
  },
  {
    brand: "Ford",
    model: "Escape",
  },
  {
    brand: "Volkswagen",
    model: "Golf",
  },
  {
    brand: "Honda",
    model: "Civic",
  },
]

DEV Community: Onur Palaz

Base64 Encoding/Decoding in JavaScript

Removing object properties from nested array of objects in JavaScript