Coding diary day 5: Arrays var fruits = [‘🍉’, ‘🍓’, ‘🍍’, ‘🍎’]

Code
2 min readMay 31, 2021

--

I’m back! Skipped 2 days, but trying really hard to develop a consistent study routine. Not going to beat myself up over it. Slow progress is better than no progress, so here is what I learned this morning:

Array Object

Arrays and Objects are collections of data.

  • The Array object is used to store ordered list of multiple values in a single variable such as the above (see screenshot) fruits variable
  • Array indexes, just like strings, are zero-based: the first element is positioned at index 0, the second at index 1 and so on. E.g., 🍉 in the above fruits variable is positioned at index 0
  • Arrays are considered objects in JavaScript but more on that later

Empty Arrays

  • Guess what, an array does not need to have anything in it to be still considered an array

New Functions I learned today

Use variables as an argument

  • Declare a function that takes an array parameter and returns it

A function that takes in an Array + Index

  • Now, declare a function that takes in an array AND an index, and returns the element located at the inputted index

Create a variable inside of a Function

Up until now, I’ve only used parameters when defining functions. Now, it’s time to change it up a little. Here is a case where I create a new variable inside a function definition.

  • Declare a function that takes no parameters, creates an array, and returns the newly created array

Next lesson, Objects, so stay tuned

XOXO

var emptyArray = [];

--

--

Code
0 Followers

watch me learn to code ☺️