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Heres how JavaScript's Nested Object Destructuring works

  Рет қаралды 91,227

Wes Bos

Wes Bos

Күн бұрын

A quick video detailing how destructuring works with nested objects and arrays. Check out my ES6.io course for more!

Пікірлер: 117
@JohannesBrodwall
@JohannesBrodwall 6 жыл бұрын
Wow! The most productive minutes I've spent all month. Thanks! 😀
@shafiq_ramli
@shafiq_ramli 8 ай бұрын
Can't believe now I get how nested object destructuring works! Reading the doc on MDN confuse the heck out of me because they didn't mention that the parent variable becomes undefined when destructuring its child object property. Good stuff 👍🏻👍🏻
@jasdn93bsad992
@jasdn93bsad992 6 жыл бұрын
3:29 destructure deeper 7:29 destructure array
@MyDutchproductions
@MyDutchproductions 4 жыл бұрын
I needed this... Honestly I still need it, but I wish I had found these videos before writing an insane loop.
@moosecouture1
@moosecouture1 6 жыл бұрын
This is also great when you combine it with Spread, Rest. Makes everything a lot cleaner
@kabirstetson5096
@kabirstetson5096 3 жыл бұрын
instablaster...
@javascriptwar9525
@javascriptwar9525 4 жыл бұрын
I was also facing this nested problems ... but from tomorrow no complain no demand Thankyou very much sir..🙌
@KuroiKyu
@KuroiKyu 6 жыл бұрын
Thanks Wes! Even when I think I know the topic I end up learning something
@manuelzamorano2580
@manuelzamorano2580 Жыл бұрын
Thank you! I was so confused until I found this.
@notthere83
@notthere83 6 жыл бұрын
I think it would've been great had you pointed out that one can of course write destructuring constructs across multiple lines. Because if you destructure nested objects and you write the destructuring the same way that you would write the object if you were to create it, it becomes very clear and easy to read.
@beingian
@beingian 3 жыл бұрын
You are amazing! i come back here at least once a week
@lpdrummerboy
@lpdrummerboy Жыл бұрын
Exactly what I was looking for. Thanks!
@vincentiusherie
@vincentiusherie 2 жыл бұрын
Never thought this is possible. Crazy.
@Shubham-jr8nc
@Shubham-jr8nc 5 жыл бұрын
Best Explanation by An Advanced Teacher
@benyamin4634
@benyamin4634 2 жыл бұрын
cool tutorial so straightforward
@jessereyes-cortes1194
@jessereyes-cortes1194 Жыл бұрын
Been using this technique for years... I finally know what the definition is haha
@Opyext
@Opyext 2 жыл бұрын
this was very handy for me, thanks so much
@devincustodio2258
@devincustodio2258 6 жыл бұрын
Seems like sacrificing readability at the expense of compactness.
@conoroflanagan2908
@conoroflanagan2908 6 жыл бұрын
Devin Custodio true, me and a colleague were tripped up on variables of similar names + 2 helpings of destructing.
@devincustodio2258
@devincustodio2258 6 жыл бұрын
Cono 52 but what do I know. I just have a degree in computer science. I'm not qualified at all to talk about this. 😂
@adrianli7757
@adrianli7757 6 жыл бұрын
As someone with industry experience, I agree completely. Write code for others to read and understand, not for yourself to feel good about it.
@nazarm6215
@nazarm6215 5 жыл бұрын
At some point you are going to have to learn and move on, otherwise readable code means you'll end up with stagnant progress in technological innovation.
@cardbored_
@cardbored_ 2 жыл бұрын
@@devincustodio2258 as someone with 20 years professional experience as a software engineer and now the director of the department at the agency I’m with, I’ve met many engineers with CS degrees who were half the programmer of some self taught developers. A degree doesn’t necessarily automatically mean someone is qualified in a real world position.
@erichepperlewp
@erichepperlewp 2 жыл бұрын
Nested destructuring...wow! SUBSCRIBED
@zdarofMERGAITES
@zdarofMERGAITES 3 жыл бұрын
Very well explained topic.
@longtimedeveloper6498
@longtimedeveloper6498 11 ай бұрын
Thank you. I was immediately successful. Thank you!
@alan614
@alan614 2 жыл бұрын
This was great! Thanks for this Wes!
@TiagoSalemaG
@TiagoSalemaG 6 жыл бұрын
Uaaau here I was all confused about this black magic fuckery just to find out it's actually rather simple and useful after watching this video. Kudos to Wes! You're the man.
@pavanrao2965
@pavanrao2965 3 жыл бұрын
The most helpful video ever.period
@emerson0001
@emerson0001 6 жыл бұрын
I'm testing this out on console in the same window as I'm watching the video. I love how simple and neat this is. - I was wondering how I could back up a level to get a parent of something already destructed. Kind of dummie, but if any else is wondering: *var data = { foo: { bar: 1 } };* Say we want to get to *bar* but still want *foo* to be available: *const { foo, foo: { bar } } = data;* *> foo* _{bar: 1}_ *> bar* _1_
@Afewwilliams
@Afewwilliams 6 жыл бұрын
You're a legend Wes, thanks for all your effort 👍
@MBehtemam
@MBehtemam 6 жыл бұрын
Wow , Really Really amazing point that you mention , I love the way and I want to use it in my daily projects
@pratik66613
@pratik66613 6 жыл бұрын
This is really useful. Thanks a ton Wes!
@writeandcodetime
@writeandcodetime 5 жыл бұрын
I certainly learnt a thing or two :) You are an amazing teacher. Thanks you
@raymonweave7157
@raymonweave7157 5 жыл бұрын
Great video, well explained and loved to watch it!
@rayraboypamisa1388
@rayraboypamisa1388 5 жыл бұрын
Wes, How can I map through that nested array?
@jordanpio2945
@jordanpio2945 3 жыл бұрын
Extremely helpful!!!
@sergiyrudenko905
@sergiyrudenko905 4 жыл бұрын
Nice, really nice. Thanks Wes!
@nikicamaksimovski9964
@nikicamaksimovski9964 6 жыл бұрын
I did not understand quite well how it helps in the example of react when you have to pass like 10 items as props.You will still have 10 lines of code.Any explanation ?
@shaunakthakar3026
@shaunakthakar3026 2 жыл бұрын
Great Video. Have been looking for this. Can someone help me with this question. How can i just pull only name from the items in the array. I don't need the other data just all the names inside the array.
@mparikshit
@mparikshit 5 жыл бұрын
Just Superb :). I love the way you explained with super energy :)
@jordandoucet6887
@jordandoucet6887 2 жыл бұрын
This is super helpful 🙏
@boulderdennis
@boulderdennis 6 жыл бұрын
Thanks Wes. One question. Are Canadian shoes normal or weird or something else?
@UliTroyo
@UliTroyo 5 жыл бұрын
They're polite shoes!
@magdasokolovic
@magdasokolovic 3 жыл бұрын
great video. Love your enthusiasm :)
@batuhankir8402
@batuhankir8402 2 жыл бұрын
how can u make a table with all keys end values
@Dan-codes
@Dan-codes 2 жыл бұрын
Thank you.
@hsngsoftware4380
@hsngsoftware4380 3 жыл бұрын
How to get only second element in the array ?
@fikrisidqi7115
@fikrisidqi7115 3 жыл бұрын
Great video, love it. Thank you sir!
@redbeardhomes
@redbeardhomes Жыл бұрын
Can you show how to render these nested objects into a table? I am easily able to console.log those items but I am struggling with the display of the tables. I can't use the map() function.
@BowlineDandy
@BowlineDandy 6 жыл бұрын
Would be nice if that nested destructuring worked on imports specifically when importing json since Webpack can now tree shake those
@Souravbaranwal
@Souravbaranwal 5 жыл бұрын
This was very helpful. Thanks a lot.
@Dethstrat
@Dethstrat 5 жыл бұрын
Wow. That was fantastic. Thank you
@alirezamousavi7939
@alirezamousavi7939 6 жыл бұрын
That was a great video. very useful. thanks bro.
@denns0r
@denns0r Жыл бұрын
Although this is kind of cool, there are two things to consider: readabily is quite poor (which is my subjective opinion) but VERY IMPORTANT: THERE IS NO HANDLING OF UNDEFINED / FALLBACK VALUES. If you destructure only one level deep, you will get no errors if something is undefined, instead you can test it in ongoing code. When trying to destructure from undefined, you will get an error. So when working with uncertain data, like from an api, i would highly recommend NOT to do use deep nested destructuring!
@sreenivasulugattu2936
@sreenivasulugattu2936 4 жыл бұрын
Thanks for the useful one. what if object is nested very deeply ? i mean more than 10 items deeper ??
@Jay-eg7yt
@Jay-eg7yt 5 жыл бұрын
Love the display. Especially how the attributes are in italics. Which them are you using?
@rs14058
@rs14058 6 жыл бұрын
This is super helpfull Wes!! 😎👍 thanks for sharing!
@vaasudhand3200
@vaasudhand3200 3 жыл бұрын
How do I rename the item1 and item2 variables?
@3ombieautopilot
@3ombieautopilot 6 жыл бұрын
And we can also provide a default value for keys that are missing.
@jaydeepkarena
@jaydeepkarena 6 жыл бұрын
really good explanation 🎉
@kamalpanhwar4487
@kamalpanhwar4487 6 жыл бұрын
Your font in editor is great, what is name of that font and color scheme? as I searched many but nothing resembling this font typeface.
@UliTroyo
@UliTroyo 5 жыл бұрын
I just found it on Wes's blog; it's Operator Mono, but it's $200.
@julianklumpers
@julianklumpers 6 жыл бұрын
You can even omit properties/keys with rest spread and destructering. const { status, ...rest } = makeItem() Rest now only contains data.
@Nemcoification
@Nemcoification 5 жыл бұрын
Just in case anyone's wondering, the same is true for arrays like: const [ status, ...rest ] = makeItem(); Arrays have the added benefit of just being able to skip the variable entirely by just doing const [ , ...rest ] = makeItem();.
@imhappynow8471
@imhappynow8471 4 жыл бұрын
thank you
@dragannovakovic9816
@dragannovakovic9816 6 жыл бұрын
5:15 a Wild render prop Appears xD
@WesBos
@WesBos 6 жыл бұрын
@GiovanniOrlandoi7
@GiovanniOrlandoi7 6 жыл бұрын
This is great. Thank you!
@narwhalboobs
@narwhalboobs 6 жыл бұрын
Hey Wes, I was wondering what Visual Studio Code plugin you're using to display comments and attributes in a different font.
@WesBos
@WesBos 6 жыл бұрын
I wrote a bit of info here → wesbos.com/uses
@AbhishekKumar-mq1tt
@AbhishekKumar-mq1tt 6 жыл бұрын
Thank u for this awesome video
@amabenuzoe250
@amabenuzoe250 3 жыл бұрын
Thanks Wes. I've been trying to send nested form input values using the window.fetch API, do I destructure the inputs or just send the form values as is?
@ramin9134
@ramin9134 3 жыл бұрын
really amazing ;)
@Peter-ur8nv
@Peter-ur8nv 5 жыл бұрын
Very helpful, thank you
@nicholassingh138
@nicholassingh138 2 жыл бұрын
hey, how would destructor the event_general part: const events = { event_id: 57, name: 'Event Name', organiser: 'John', category: 'Music', event_general: [ { venue: 'unknown', country: '2', isVirtual: true, story: 'null' } ] };
@TheNinad22
@TheNinad22 4 жыл бұрын
i am having difficulty destructuring this array I want output as R8 below is array var obj = [ { title: "buy meal", isDone: false, }, { title: "come office on time", isDone: false, }, { title: [ "BMW", [ { id: 01, name: "R8" }, { id: 02, name: "r7" }, ], "maruti", ], isDone: true, }, ]; can you help me?
@hitheshkaverappa8634
@hitheshkaverappa8634 4 жыл бұрын
What if i need 2nd element of array (item2)
@sundarraaj2944
@sundarraaj2944 Жыл бұрын
How to add an object to a nested array of objects dynamically using distinct properties of an object
@egougwu1123
@egougwu1123 5 жыл бұрын
how do u destructure into a variable please?
@lynxlagoon
@lynxlagoon 3 жыл бұрын
dude, thanks
@sumantkanala
@sumantkanala 6 жыл бұрын
You go Wes!
@gauravdawg
@gauravdawg 5 жыл бұрын
can you suggest some good plugin for formatting the JSX code in VSCode ? I have components within components and each component have their own props, its such a waste of time manually pressing tab to fix the formatting to improve readability
@JosephChambers
@JosephChambers 6 жыл бұрын
Thanks Wes!
@SinaGilassi
@SinaGilassi 4 жыл бұрын
Cool!
@dan-3268
@dan-3268 5 жыл бұрын
Beautiful ❤️
@duckhorse2563
@duckhorse2563 4 жыл бұрын
Asante.
@alialqahtani7841
@alialqahtani7841 6 жыл бұрын
good video thanks Wes Bos
@sagiriizumi8284
@sagiriizumi8284 6 жыл бұрын
Thanks! :)
@simonkalu
@simonkalu 5 жыл бұрын
True Bos
@JoeWong81
@JoeWong81 5 жыл бұрын
thanks bro
@kissu_io
@kissu_io 6 жыл бұрын
Siiiiiiick video, sick sick sick. 💪🏻
@navinkandpal6767
@navinkandpal6767 2 жыл бұрын
Good 👍
@WebDevProfesh
@WebDevProfesh 6 жыл бұрын
Is there a way to only destructure the second item in an array, without destructuring the first?
@abdulazizalabodi
@abdulazizalabodi 6 жыл бұрын
yes, arrays are just objects in js. so you could do const {1:s2}= [1,2,3]
@WesBos
@WesBos 6 жыл бұрын
const [,secondItem] = someArray;
@davlewis2011
@davlewis2011 6 жыл бұрын
So if I wanted the like the 10th index, I’d have to put 9 ‘, ‘ and then my variable?
@abdulazizalabodi
@abdulazizalabodi 6 жыл бұрын
no look at my answer.
@CoryTheSimmons
@CoryTheSimmons 6 жыл бұрын
Really cool Abdulaziz, thanks.
@philipdegendt56
@philipdegendt56 3 жыл бұрын
Super 👍👌
@alexpro5670
@alexpro5670 2 жыл бұрын
Деструктуризация объектов и массивов
@germantoenglish898
@germantoenglish898 Жыл бұрын
If the parent is an array with a nested object or visa versa and their children are arrays nested in objects or visa versa, it can all be so overwhelming and confusing.
@augischadiegils.5109
@augischadiegils.5109 Жыл бұрын
cool 😎
@teenytinytoons
@teenytinytoons 3 жыл бұрын
You may have to play this video at half the speed.
@justinoneill2837
@justinoneill2837 6 жыл бұрын
Hi Wes, thanks a ton for this breakdown. I've still got a little confusion on how you make multiple variables from the same function and/or data set? For example, let's say I wanted to make *4 different variables* from the *makeItem()* function... how could I do that w/ out having to make *4 different makeItem()* functions? I put together a codepen here: codepen.io/oneezy/pen/VXWLXa?editors=0011
@moosecouture1
@moosecouture1 6 жыл бұрын
I do not see where your codepen is showing any changes... but if I understand your question... if it is like what is being shown here with destructuring... you could pass it an array and destructure the array `const [ one, two, three, four ] = [makeItem(), makeItem(), makeItem(), makeItem()]` Otherwise I do not know how it falls into the scope of this quick tutorial.
@ethanstewart8957
@ethanstewart8957 6 жыл бұрын
Not sure I fully understand the question. Are you talking about having data, item, etc. also be variables when you're four levels deep?
@Opyext
@Opyext 2 жыл бұрын
ur so cool
@tubehelpr
@tubehelpr 4 жыл бұрын
Neat but pretty hairy!
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