JavaScript Array Reduce
ฝัง
- เผยแพร่เมื่อ 14 พ.ค. 2018
- JavaScript Array Reduce
🔥Get the COMPLETE course (83% OFF - LIMITED TIME ONLY): bit.ly/2KZea52
Subscribe for more videos:
/ @programmingwithmosh
Want to learn more from me? Check out my blog and courses:
programmingwithmosh.com
/ programmingwithmosh
/ moshhamedani
![รวมเพลงลูกทุ่ง 6 หนุ่มไทบ้าน ฮิตติดกระแส ชุดที่ 1 l มนต์แคน ไมค์ ไผ่ เสถียร ไหมไทย พี [Longplay]](http://i.ytimg.com/vi/GD2v1OjMw5I/mqdefault.jpg)
Once again Mosh shows why he's one of the best coding teachers. You make things very clear, because you explain what EVERYTHING is, in laymen's terms. A lot of coding teachers forget they're teaching beginners.
Finally... Somebody who explains reduce well. MDN documentation didn't help me.
Just came from MDN 'cause I didnt understant a sheep!
Exactly.
You are very right! MDN didnt help at all...
Ikr he is awesome
So much clarity in 7 minutes video !
How am I only finding your tutorials now. You explain so well. I'm taking you with me for the rest of my Java script journey.
Been looking high and low for a simple explanation of the reduce method, and only now I have found it. Thank you.
This is by far the clearest explanation I've seen on the reduce method so far.. Thanks a lot Mr Mosh..
The English is just so perfect for a non-native speaker like me. The explanation is so easy to understand too. Thank you so much, you get my subscription!
Awesome , just understand what is the role of the "Accumulator" and the "Current Value" makes everything very clear. Thank man!
I've explored every single line of MDN reference, but I didn't learn as much I could get from you. Appreciate that mate
Boss more blessing to you, love from Nigeria. You just explained all MDN couldn't in minutes
Thank you Mosh. I wish everyone can explain things as clearly as you.
By far the best explanation of reduce I have gotten haven watch tones of videos and tutorials
finally, I can totally understand the reduce method thanks to you, appreciate your channel
Thank you Mosh. This is one of the best explanations about how to use reduce, that I could find on TH-cam.
This video is posted a long time ago, but for the first time i understand reduce. Thanks Mosh!
Great tutorial, very well explained and easy to follow, I can finally say I understand the reduce method. Thanks you! Hope to see more tutorials like this in the future, like this key word, classes, call, bind, apply, etc.
Thank really. I was making a project. I am adding tips of bills as % to a calculation machine and i need to sum all tips and print. At the end i succeeded by looking to your tutorial. Thanks so much.
Hadn't got used to that reduce method and was struggling for a while, only took me a minute of your explanation to spark a lightbulb in my head and I felt relieved. Thank you.
th-cam.com/video/a_Bfu1XWGmI/w-d-xo.html
I spent 20 minutes on mdn understanding all this. I got more confused there.Thanks man
Thank you for explaining this right! No one seems to explain the first callback value as the accumulator but yet as the previous value.
The first tutorial that made me understand reduce method. Thanks.
This is super detailed, yet simple to understand, just great!
Took me a while to get reduce even after learning all the other iteration methods. Thank you!
You're the BEST Instructor I've ever come across +ProgrammingwithMosh
*sheds a tear* LOL :D -- I can't wait for more JS videos!!!!!
After watching this higher education, I was finally able to deeply understand it. Thank you!
Cleanest explanation I've seen so far. You just earned yourself a sub.
Best method of teaching reduce method from complicated to its simplest possible form all under 10mins. You are amazing good sir. Thank you
Excellent explanation. I was confused how it worked until I saw this. Keep doing what you're doing man!
Thank you, Mosh. I found this very helpful for grasping the concept of reduce().
Thank you for breaking this down in detail. Very easy to understand.
Thank you so much for this tutorial! Love the no-nonsense approach that any layman can pick up on :)
i just bought a 100 algorithms course from udemy.com. I prefer the way you teach. You explain everything thoroughly, the course instructor seemed to rush through the videos.
Can anyone explain why for loop or foreach is "old way" and reduce is more "elegant way"?
I find the"old way" more readable than the "elegant way"
understand the elegant way and use the readable way if you want, after some months you will like to use the elegant way
I also think the "old way" is better. The "elegant way" is limited to iteration of type y_n = f(y_{n-1}, x_n) where f is the callback function. There is this new movement in programming where people think old fashion for-loops are ugly code.
Thank you dude, this is incredible. I wasn't understanding this before watching your video, thank you.
It would be great if you explain how the accumulation can be an array or object, and how when instead of chaining map and filter we can use reduce. I guess it's in the complete course.
If you were using an array, you could return an array in the reduce, and spread the accumulator. Then add any new value after. Example:
nums = [1,2,3,4,5]
const doubledNums = nums.reduce( (acc, num) => [...acc, num*2], [ ])
console.log(doubledNums) // [2,4,6,8,10]
Obviosuly a .map could do the same thing but there are more complex examples where it is useful.
@@liamwelsh5565 Hi, I'm very new to coding, may I know why did you add the "..." before acc? I'm not really sure what it does here
@@Xetron1978 … is the spread operator. If you have an array, let’s call x and want to make a new array, let’s call y, that has all the values of x, you can spread x into y.
Example:
Const x = [1,2,3]
Const y = […x]
Console.log(y)
// [1,2,3]
You can also spread objects into objects
I'm from Brazil, but you explained so well. Thanks a lot!
Literally just spent an hour trying to figure this out from reading on MDN. I understood beforehand how reducing works. I'm familiar with the concept from a few other languages, which implement it more elegantly through lambda expressions. Javascript syntax can be odd at first, and it all came down to simple syntax errors I was making.
Best code videos I ever watched. Thank you brother!
I love he teaches coding very clearly in a short amount of time. He's the best coding teacher.
th-cam.com/video/a_Bfu1XWGmI/w-d-xo.html
Hooray, finally someone explained normally .. thank you very much!
Mosh, thank you so much! You broke this down into a very easy to understand way.
Finally ... some who explain reduce well .Thanks
This is nice but it'd be great if there was something on how to use reduce when making new objects/arrays
Mosh is everything a newbie needs!!!
Thank you so much for the beautiful explanation of reduce the method.
Wow, so I was trying to understand this by reading it on MDN and it was just not sinking in. This helped SO much! Thank you good sir.
Man, amazing explanation! So much better than some of the videos and websites I have seen on this topic!
This is very clear and simple explanation!! Thank you very much 😊
I was totally in the dark with this Reduce thing...thanks for explaining🙏 great help 👏👏👏
"Just check MDN" does not help. These videos are the only things out there that actually explain anything. Thanks Mosh.
Having it explained in video form is so much easier for me than reading it. Thank you!
th-cam.com/video/a_Bfu1XWGmI/w-d-xo.html
This was VERY helpful and clear. Thanks, Mosh
Thank you for making js clear and simple to understand
thank you for explaning the basic concepts very clear...best explanation
Cheers, nice way of explaining things, I always pass ur videos when it pop ups now I watch and it's wonderful.
Wow! Explained in a super easy way. Thank you.
Lovely explaination and lovely Mosh.
We Love You Mosh, From Iran.
Thank you. Better than any video out there.
one of the best explaination I ever watched
Wow this guy is simply the best and you cannot dispute that
Please having one problem in the for loop why he doesn't include curly braces bro please does mosh installed any extension to do so?? Please someone reply
wonderful explanation!!! tnx for been there Mosh!!!
What is at the advantage of "reduce"? Is it just syntactic sugar or is there a performance gain?
Is there other benefits of using .reduce() method other than the readability and cleaner code?
Explained better than MDN. Good job!
Great vid , helped me to finally jump that mental hurdle.
Thank you so much brother,your explanation was very simple and clear
How did the function taked "numbers" const?
This made my brain hurt a lot less than the lesson I was reading. Thank you!
Thank you very much for this explanation . It was really useful. Keep up the good work.
Awesome explanation! Thank you for this!
Thank you sir for explaining this so clearly.
great explanation Mosh..
[...Array(1000)].reduce((acc, elem) => {
return acc + 'Thanks Mosh ';
}, ['Great Explanation ']);
Thank you mosh you explained it perfectly
Finally!!! Well explained in details. You’re a good man
Excellent explanation of reduce function.
You are a king in easy explaining
Great video on reduce(). Thankyou you have clear all my queries and doubts
Quite Good tutorial with some good examples how actually reduce works. Keep it up
But why 'minus' operator in reduce function results in -3, when it's obviously -5? (when not specifying index)
thanks buddy for making concept clear
You explain very well. Thanks!
It was really clear explanation. Thanks a lot Mosh!
Easy and simple, thank you!
Does anyone know if we can change the function to where it SUBTRACTS and accumulator and aggregator?
Also, why the need to write out an entire function if a method is supposed to be a shortcut for this?
Excellent breakdown as usual, cool new js feature
Thank you Mosh!!! This ruled!!!
You’re the big boss. 😎😎😎 I went through other websites and videos but your explanation was the best.
Thank you very much! I had the answer all time at home, since I was subscribed to your channel before. 🤩🤩🤩
What if you had multiple objects with multiple properties nested inside an array and you wanted to use .reduce on the same property for each object? Just need to nest everything properly?
what theme are you using?
Very well explained. Thank you.
Thank u for the great explanation
let num = numbers.reduce((a,c) => a+=c ,2)
why in the for loop he doesnt put curly braces please someone help if some extension he add for it please
You are the best instructor mosh
thanks, for your clear explanation
you have made it simple man ! kudos
hi Mosh thank you for the video. one thing i didnt understand was the second argument (0), i understand that it represents the number 1 (being the first on teh array) but what if thaht number is 3 or 10 what will happen when the code logs?
Thank you so much, wonderful explain
Very helpfull and clear as well in the explaination MDN was making me crazy. Thanks mosh! :)
Wow very clearly. Many thanks
Such A smooth Explainer