JavaScript Array Method Exercises 05

In this video, you'll get another chance to go through some practice exercises with JavaScript Array Methods.

Here's the Gist with the people array and exercise details:

Jump to any of the exercises:
01:24 Exercise One (02:41 Final Solution)
03:32 Exercise Two (04:35 Final Solution)
05:04 Exercise Three (06:17 Final Solution)
06:44 Exercise Four (08:09 Final Solution)
08:34 Exercise Five (10:52 Final Solution)

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In the tutorial, you'll learn about various different array method available in JavaScript by completing some simple exercises on an array of data i'll provide you with.

Don't worry if you get stuck - i've provided example solutions but feel free to post your own if you come up with something different.

#JavaScript #Practice #Exercises Channel Handle @codebubb

[grgol]

Thanks, bro, for your lessons and practices. I watch all your videos! The best way to learn JS!

[toscaantosca]

Thanks for exercises!
While i did these excersises, i found out a new method for me to flat arrays without flat() function.

["nostrud", "aliquip", "est", "laboris", "voluptate", "do", "dolor", ["deserunt", ['anotherLevel', ['wolf', ['waff!']]], "ipsum"], ["consectetur", "quis", "commodo"]].join(', ').split(/, \s*/)

[nizarahamed.m]

Ex:1 using spread operator
let k = []
for (let i of accounts[0].tags) {
if (Array.isArray(i)) k.push(...i)
else k.push(i)
}
console.log(k)

[siemen_subbaiah]

woah learnt about array flat today.
thank you so much🚀

[manzarabbas]

Exercise#1
const tagsArray = [].concat.apply([], accounts[0].tags);

[vamsimunukoti]

how to do first one with map and spread, i am not knowing it

[mahmudurrahman]

Have you got any JavaScript regex exercises? Thanks

[elliott_]

Can this work for Excercise 3 ?
accounts.reduce( (accumulator, account) => accumulator + account.tags.join(', '), ' ' )

[XFaramir]

The last one U didn't use the reg exp :
const listFriends = (accounts) =>
accounts
.filter((account) => account.age < 30 && account.balance.slice(1) > '1500')
.map(({ friends }) => friends)
.flat();

[pratyushranjan]

exercise 4:-
const allFriends = [];
=>