STOP Making These JavaScript MISTAKES

[@satheeshm538]

Another great video buddy. I started front end expert and I am in javascript crash course. All the contents till now is awesome and pretty straight forward. And css interview questions are also good and well structured. Thanks conner..

[@ConnerArdman]

Thanks! Glad you’re enjoying it!

[@xtu373]

you worked at Facebook can you tell me in which frameworks language facebook is written

[@ConnerArdman]

The frontend is mostly React with Flow (basically Facebook’s version of Typescript). The backend is mostly Hack (Facebook’s version of PHP) with GraphQL. There’s a ton of other languages and frameworks being used in various places where it makes sense though.

[@varunpalsingh3822]

Plz make more videos like this

[@xtu373]

How do i know that i am a good software developer? i mean i know that i am a good but what hiring managers see that this developer is good?

[@ConnerArdman]

I’ve never been a hiring manager for developers, but I would say it’s mostly about technical interview performance. Aside from that, just having good communication skills to be able to articulate your solutions to technical and non-technical problems. A strong resume of course helps as well 👍

[@MrSurecom]

Hahahahhahahahahhahaha hahahhahaha teach Indian guys with such things :)

[@cx24venezuela]

Reduce example have a bug. It should take Zero as second argument for sum without problem

[@ConnerArdman]

The second parameter to reduce is optional. If it isn't included, then the accumulator just starts at whatever is the first value in the array and the current value starts iteration from the second value. While being more explicit might be better stylistically (I've seen differing opinions on this), either way works for a simple sum 👍

[@TheOne-qv3xw]

3:06 and my team leader always tell me to write the comments , but i forgot to write the comments , i means yeah time is less need to complete the story , so only few lines or input output mentioning i do on few method , that much less comments what will you suggest

[@ConnerArdman]

Different teams/companies have different policies on this and obviously you should do what they want. My first few code reviews all told me to write less comments and that’s what I generally prefer now 🤷‍♂️

[@TheOne-qv3xw]

@@ConnerArdman and for me they always thought to write the comments so i started writing few and less comments

[@tarn84]

great video! definitely made these mistakes lmao

[@ConnerArdman]

Thanks!

[@xtu373]

In which framework facebook mobile app is Written?

[@ConnerArdman]

Mostly React Native these days, but some parts of it vary afaik

[@xtu373]

@@ConnerArdman I think only Facebook market place is written in react native not Facebook are you sure? Tech lead said this

[@ConnerArdman]

He might be right, I never worked on mobile other than a tiny bit on marketplace which was all react native. I think most of the new stuff is RN, but there is probably a lot of other stuff for older projects. There’s a PHP frontend framework that predated RN that I think is still used a good bit.

[@852charliepapa]

Great video. I'm interested in the alternate solution to Mistake 2. How exactly can we employ async/await to log the temperature without 'undefined'? Do you have another video explaining this? Or can you refer me to some resources? Thanks.

[@ConnerArdman]

Something like this. Async/await essentially makes this problem nonexistent as long as you remember to await all of the asynchronous function calls. It will just wait for the result to come back rather than continuing on. const res = await fetch(...); const json = await res.json(); const temperature = json.temperature; console.log(temperature);

[@test-gx3ye]

Have you ever read the ECMAScript language specifications? And do you know if any of your facebook coworker peers ever read it?

[@ConnerArdman]

Not sure if this is sarcastic, but yes I actually have. I read through it while making the FrontendExpert JS crash course (or at least skimmed it all). I don’t think that’s something that you really need to do to be a good JS developer though.

[@Tony.Nguyen137]

Great video. i watched all the ads so you don’t ever have to work anymore

[@ConnerArdman]

Thanks! 🤑

[@michaelscofield2469]

You look like Frodo Baggins with keybord

[@ConnerArdman]

I’ll take that 🤝

[@bonersducks5648]

As a newbie, i feel i could have done some of them. Thanks for useful info

[@ConnerArdman]

Thanks for watching!