? in NaN Seconds

[@gradientO]

You changed the title from _" JS ? in 100 seconds"_ to _" ? in NaN seconds"_ Cool

[@amine_akad]

Maybe KZbin's script didn't recognise "100" and displayed NaN instead

[@thos3474]

@@amine_akad It's due to the fact the video is longer than 100 seconds

[@Fireship]

I think "? in NaN seconds" has a better ring to it

[@amine_akad]

@@thos3474 ikr, my reply was sarcastic

[@oskrm]

@@Fireship has a better [object] to it

[@GoodVolition]

I used to be very down on the ternary operator. I've come to see they have a place. Great mention of optional chaining I'm a big fan.

[@TheNewton]

You can get that feeling back when you have to debug a nested set of ternary's more than a few deep. Otherwise perfect for oneliner toggles not involving booleans

[@pitust]

The ternary is still worse than rust-y if case expressions.

[@hsemog]

Hey Jeff, We need a “Fireship answers in 100 seconds” 😄

[@KangJangkrik]

Can't wait until someone ask face reveal

[@IanSfirebirdflame]

Just so you know, your videos have changed my coding style over time. I keep learning new abilities, or nice features I didn't know about, resulting in me going back to my code and making changes with these cleaner solutions. Your videos are having a direct impact on me. Thank you.

[@Fireship]

Glad I could help!

[@girllovescoding]

It feels like I was waiting my whole life for JS to introduce optional chaining. Thanks for a great video!

[@realgarmingo]

This channel is amazingly helpful. Thanks.

[@duuhhveeed]

Holy mackeral, ive been obj chaining recently and wanted to find a better solution and you just showed me something big. Fireship does it again

[@cicicad]

Same here, down with (foo || {}).bar

[@mycloudvip]

We’re are here to stay. We love your 100 Sec. Videos. Thumbs up

[@Chiefsosa17]

Ternary on return values are actually very readable once you get used to it. Just make sure you split the condition and the returns on each separated line

[@Fireship]

I agree, it's just a common criticism when people first encounter them.

[@softwarelivre2389]

@@Fireship sometimes I even chain ternaries, like: cond > 100 ? '#FFFFFF' : cond > 80 ? '#999999': cond > 30 ? '#444444': '#181818';

[@Chiefsosa17]

@@softwarelivre2389 I dont this this is too bad either, but couldn't this be turned in a Switch statement then?

[@tomebundalevski1872]

@@Chiefsosa17 no

[@softwarelivre2389]

@@Chiefsosa17 this is more declarative than switch statements, doesn't create new scopes and is more straightforward, but I mainly use this on simple one-off scripts.

[@ExtremeGamer109715]

Subscribing to this channel was the best choice ever!

[@suman-majhi]

I would like to add one more operater in this list which is Logical Nullish assignment operator ("??=") Example: let a=7; let b=null; console.log(b) //null console.log(b??=a) // 7 console.log(b) // 7

[@quirky_hehe]

I'm a an experience developer and I actually learned something. Great videos as always!

[@kylemckell]

Jeff, I think you juet saved my life by letting me know how to solve a pesky bug from fetching data from an unreliable api with the optional chaining.

[@softwarelivre2389]

Unreliable APIs are hell on earth without optional chaining. Been through that path, my friend, and it is indeed not beautiful.

[@klutch4198]

the most powerful 100 seconds video yet

[@mirandamoralez6354]

depth, sound, voice - so great always! THX A LOT!

[@reyanrahman]

U have no idea how much time this little question mark will save thank you so much keep making more shorts like this

[@othman_]

Im very glad in the past i've learned Swift , Ruby and Java. Javascript NOW take many great ideas from these languages and evolve with developers.

[@iancuvlad7368]

1:42 That Kotlin feeling...

[@adambickford8720]

Glad you brought up the expressions vs declaration. mutation is evil, even more so in a multi-threaded language. It's the same reason you should generally avoid ALL declaration like if, for, while, switch, etc. and prefer reduce, map, etc

[@Roboprogs]

Erlang has entered the chat… 😁

[@CodingWithLewis]

Love your videos. Very proud to say that I am here before you hit 1 million subs.

[@ark5458]

should be: js in NaN seconds

[@Fireship]

I concur!

[@ayoubbelmehdi6196]

Or undefined in NaN seconds

[@ark5458]

Haha, you actually did it

[@vallemuller5594]

[object Object]

[@Musaakdaag12]

Thanks i knew about Michael Hill! He was my professor in Oxford and told us about FBC14 algorithm!

[@Nintron]

Watched this video and then 30 minutes later I needed some default value if one wasn't passed and remembered nullish coalescing from this video. Big thanks!

[@aleksandarstevanovic5854]

I had NO freaking idea for optional chaining, and was doing && && &&, and i was very glad they implemented in php 8.0, didn't know i had this on both sides... Thanks dude!

[@lukehatcher98]

Wow nullish coalescing sounds amazing. I’m gonna start using that right away 🤩

[@octagonalt7311]

i love videos like these, keep it up!

[@akashmelkeri]

it's been nearly 8 months since i started using js for work. and today i got to know 2nd and 3rd use of question mark. these 2 uses will save a lot of time for me buddy. thanks

[@valentincamus8343]

Thank you very much for the optional chaining !

[@TudoSempre]

I definitely don't get tired of watching your videos.

[@JandyCZ]

This solves 2 problems very efficiently.

[@mirkosedda3196]

These videos are more valuable than they are short.. just brilliant job!

[@neeeeeck9005]

Glad you changed the title in time! I'd not watch a video otherwise and probably regret it. Your content is on top, as always. Like.

[@TehLostGamers]

I know those operations and still watch the video, it's very amusing and to the point. I love your videos keep up the great work!!!

[@nathanielyoung]

Freaking love the ternary operator!!

[@diete103]

I thank you so much for this video because optional changing is something I didn't know I needed in my life!!!!

[@pierluigiomargiancola7388]

Thanks, didn't know about Nullish Coalescing :)

[@nyghtseven]

I changed mission to python for more than a year now, but everytime you release a video i want to go back to js !

[@complex5372]

Wow, didn't know about that last case. Thanks for sharing.

[@nothingnoone8752]

Woooow this was useful, nullish coalescing is gonna save me so many try()'s

[@sanzhar.danybayev]

Thank you! I use all of them when I code

[@rafaelpernil]

I use those daily and they really make JS much more enjoyable and concise

[@edencheung8468]

That was the most I have learnt about programming in 100 seconds!

[@RonDLite]

Best title in ages, great start of the weekend

[@TheRealKitWalker]

Ohh yes, I felt soo good after I used in my project earlier this month. It felt liberating 😍😍

[@akifimran9780]

so much information....makes me happy.

[@TheSuperSausageDog]

I only sometimes use javascript so I never heard about optional chaining. This is huge!

[@CorruptedPixl]

Damn, at the start I was like "I know what a ternary operator is, hah" but ended up learning 2 new ways to use it, awesome!

[@epajarjestys9981]

the other two ways are not ternary operator

[@AutisticThinker]

Mind blown in 100 seconds.

[@ThePayanazo]

Thanks for this man, i appreciate your teaching, for a person who is starting in this, this is literally gold.

[@watchocho2660]

I'm going to use this to restructure my whole codebase. Awesome.👍

[@chiefkanakana]

Gosh, nullish one was literally life changing ✌🏽 Thank you!!

[@0xcoburn]

Awesome video Jeff!

[@marcopetaccia88]

Thanks, great explanation!

[@allisonmachado]

Again, another awesome video 😎

[@chinmaypadole9080]

Being a C# Developer, it feels great to see these changes in JS

[@mo99]

2021 Jeff is on a roll with these videos 🔥

[@ChessFlix]

You really make some crazy good tuts man.

[@daleryanaldover6545]

when I learned ternary operator, it was life changing.

[@thebaconbreadful]

I really like these videos. Your production value is SO high. Thats especially notable because other programming tutorials are so long and unorga-/optimized. I think it would be a really good time to update your firebase/angular authentication video. It would not only come in a good time personally but also fit nicely with the firebase basics and security uploads :)

[@kenji1366]

Thank you. Short vid and gives much knowledge. Saw lots of these ternary expression used in codewars

[@vcoppolecchia]

@fireship I LOVE YOUR CHANNEL!

[@CrackThrough]

i needed this. thank you.

[@lawlessfpv]

I LOVE the ? expression ❤️

[@user-he4ef9br7z]

Those days I used the ternary operator in school just to confuse the hell out teachers.

[@aidenyang747]

I can’t wait for your NextJS firebase course!

[@abdo.magdy.]

The optional chaining is called Nullsafe operator in langs like csharp and php and many other langs

[@Roboprogs]

“Elvis” operator in Ruby

[@Muaddibkhan]

Great video as always

[@snithfferx]

Thanks for the video. It answer some of my questions of ?? and ?, and why is not using in JS... was because I didn't is exists. Now, is time to update lines... see ya.!

[@nerf66770]

Great video, as always! Thank you for wrapping this info nicely

[@andrejvujic]

More flutter please!! Btw great video

[@_tsu_]

Rust has no ternary but it's if statements can return values so you can do "let foo=if(a>b)bar else 0;”

[@RoosterLewis]

This is exactly what I needed. Thanks!

[@JeffPohlmeyer]

YOU'VE BLOWN MY MIND!!!!

[@TheRanguna]

Minor nitpick, the token for optional chaining is '?.', question mark and a dot, they both replace the normal dot. Either way, great overview

[@briandesign]

can't believe I'm this early

[@letsbuildseries]

This is fantastic! Great job!

[@KarteekRakshit]

Thank you... The second one is definitely life changing.

[@kuldipthakkar1508]

Amazing Sir 💫💫

[@EXQEX9]

Optional chaining has had full support since Chrome 80 and I had literally no idea until this video. I'm only thirty years old...I thought it would take way longer to become this slow.

[@fidelsule4181]

Nice video glad to be first to watch

[@heibam]

GOD DAMN it is insanely helpful

[@itzmeB2]

Love the outro

[@MythiPlayz]

I would love a video comparing and contrasting dart and js.

[@albertbennett6290]

I think he already did one kzbin.info/www/bejne/baSti5xmnNd5iJY

[@pantanom18]

amazin explanation good job

[@mattoattacko]

This was actually really helpful, thank you!

[@a29stech33]

You are great, you are fast that's why easy to understand, && save time.

[@mohanaggarwal4058]

Well, good to know that js have these operators, do u know, kotlin already have these operators, first one is the safe call operator, which is just like operator in js but it is compulsory to use on all nullable objects, and second one is elvis operator(?:), which is exactly like - ?? in js, that will give default or second value if first value is null, otherwise the first value. Well, im hoping that u'll made one video on kotlin, it is really awesome, and it is the language that i have learnt so far, and yes i have tried many languages, but kotlin literally felt the best and did a great job. But best of luck and keep making videos like these.☺👍

[@paulwhiterabbit]

Its great that JavaScript gets new features. But if possible, I want to use Typescript or at least a framework so I can utilize the new features without worrying about browser support and polyfills.

[@jonlothar6126]

Great Video (as always)! I've never been able to figure out - whats the VS Code theme and material icon theme that you use?

[@lolownq]

Theme and icons are in video description

[@Sxxov]

don't forget about `??=`! super nice to have next to the other conditional assignment operators eg. `x ??= y`becomes equivalent to `x ?? (x = y)`

[@evandroprogram]

You forgot the nullish assignment operator (??=) which is also very handy!

[@jovan93bl]

Another great video, thx

[@ninjaasmoke]

You don't have to tell me to hit the like button, I always learn something new I always hit like♥️🤩

[@krozaine]

From Ruby on Rails (RoR) : 1. user.try(:write).try(:code) 2. amount = amount.presence || 23.99

[@denzel420]

its just gold!

[@arielmorningstar3399]

Awesome vid!

[@ahverypro]

I love you ternary operator

[@shateq]

Really cool video

[@Chmze799]

i'm pretty sure the analog for this in lua is "condition and truthyValue or falsyValue" since it basically works the same

[@Tw33tMonsta14]

Swift been had this