I always missed a senior developer at my job. Now I have one called Brian.

Hi Brian, I'm from Belarus, really like your lessons, saw the implementation of these methods used by other teacher. These methods can be written even shorter let sum = [1,2,3,4].reduce(0, +) let filtered = numbers.filter{$0 % 2 == 0} and let transformed = [1,2,3,4].map{ $0 * 2} Good luck and sorry for bad english

Love your content, more stuff like this is greatly appreciated.

Awesome explanation!!!

Thanks for the quality videos!

Loving these videos, look forward to these after a long day at college 👍🏽

Really great video. This is how you take yourself to the next level

good. first time hearing this. would like to see more videos like algorithms.

Great job man! Would be cool to see more advanced and complicated algorithms though:)

Hi Brian: Great video and explanation of these concepts. Thank you. A small request: could you do a similar video explaining the mechanics of closures, functions and completion handlers (in Swift)?

great video as always. Would love to see a tutorial on avoiding memory leaks in closures.

Great video. Very helpful. Swift greeting from east coast.

新年快乐！！Thank you again for a great tutorial!

Thanks for a great informative video Brain you are the best! I would love to see more algorithm videos, on graphs and trees. Maybe an introductory video on RxSwift?

Great videos! ...this would be what's call know on Swift UI closures? ....Thanks

Hi! I really love your videos. And I love the no-storyboard principe. Can you make a beginner video for no-storyboard best practises?

so COOLLL ... next, do a video on FP principles :) it really makes imperative code better... even OOP code better!!

Birthday present is a LBTA video :D good one as always

3:40 filtered is a 'let' constant, so it can't be mutated, if you make it a 'var' you can append new values.. But great tutorial as always. Thank you Brian.

!! thanks. Earlier this week I had hard a really hard time making a view controller talk to another view controller, understanding the navigation stack present/dismiss, and how to implement a protocol + delegate. I have a decent working knowledge now, but anything you could highlight about those topics would be neat :) /source: beginner struggles

This series is great bro. Can i ask how much time you spend preparing for this video for example? It seems very fluent and perfectly executed with no errors :)

Nice video Sir

Nice video, thank you. Can you make a video for the "Where" in Swift3, saw that in swift 2, but don't know how to do it in swift 3

reduce form i understand like this: array = [1,2,3,4] , var sum = array.reduce(0,{(value1:Int, value2:Int) ->Int in value1 + value2})

its possible a video tutorial about implement a viper design pattern? Thanks

These functions can be hard to understand, but powerful if you get how they work

Hey Brian: How do we use the data which display in Singly Linked List to Uitable view Cell

Closure expression syntax explained: docs.swift.org/swift-book/LanguageGuide/Closures.html

Can you tell me how to do dynamic reduce() method for all type array

Great video. btw now in Swift 3, we can use the reduce function like sum = [ 1, 2, 3, 4].reduce(0, +) sweet right!?

Is there a Lodash kind of library?

新年快乐，😆💫mentor！

新年快乐 Brian

i want to learn how i can drag and drop image in swift 3 xcode 8? can you help me,please?

Do you have any video where you show how to filter in Firebase?

Hi Brian and everyone! I saw there many tips to do the same trick in reduce function, writing with some differences but get the same result... just to be curious, exist any kind of difference between on the next?, the result is the same but writed with some diferences inside on the function.... but the compiler say, 4 times in one, and 5 times on the other, obtaining the same result, 10 in this case... let sum = [1,2,3,4].reduce(0) { (sum, number) in sum + number } sum. result is 10. and the compiler say -- ( 4 times) let otherSum = [1,2,3,4].reduce(0, { sum, number in sum + number }) otherSum. result is 10. and the compiler say ( 5 times). what is the difference? and why say 4 times in the first code and on the other say 5 times? maybe doesn't matter, I just curious thanks Brian! and thanks to all those who comment helping each other!

A shorthand for the reduce function is: let sum = [1,2,3,4].reduce(0, {$0 + $1}) //prints 10 A shorthand for the shorthand for the the reduce function let sum = [1,2,3,4].reduce(0, +) //prints 10

Further reduction to the sum (Shorthand argument names) let sum = [1,2,3,4,5].reduce(0, {$0+$1})

can we use the map function with optional ! array objects? those that can be nil..

You missed FlatMap. Btw, great video!

One doubt, when you used map , the number of times increased to 5 where as the old school way shows 4 times .. is it running more number of times ??

I understand the purpose of core data, animation, UIkit, collection and table views and other stuff but what is swift algorithms used for?

maybe some sorting algorithms?

How are map and filter different? What would happen if I type [1,2,3,4].filter({return $0 * 2})?

Nice! ....and flatmap?

awsme :)

at 6:49, the array [1, 2, 3, 4] has 4 elements, but the map function runs 5 times, why is that?

do you functional programming, Brian?

Why does $0 equal a value in the array? Is that just a universal Swift thing?

3:36 That was confusing. Call inside of higher function call you can't append? Its only because you used Let which is immutable. If you used var it would be fine. Also didn't understand what you meant by "state" regarding an array. Also the () is not necessary in ({ }). {} is enough. Weird that both is allowed? And just found that you don't even need return. So var filtered = numbers.filter{ $0 == 3 } works. Its annoying that different syntax is allowed.

Sir can you just explain the difference between get,post and put differences in detail?

I've been using their own syntax since then because of readability, now just f**k I will use $0 and $1 haha

why this is excute 5 times but with for loop excute 4 times???

I wish I have rather spent time watching your videos that pewdiepie's

you know?..another youtuber came here! and he clicked "dislike" !!!. common guys. appreciate don't' show jealousy