Flutter Tutorial - Dart List Utility Methods: ForEach, Map, Contains, Sort, Reduce, Where, Expand

Learn how to use Dart List Utility Methods such as forEach, map, sort, reduce, every, where, take, skip and expand in Flutter.

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TIMELINE
0:00 Introduction Dart List Utility Methods
0:32 List ForEach Method
1:26 List Map Method
3:32 List Contains Method
4:32 List Sort Method
5:24 List Reduce Method
6:38 List Fold Method
7:51 List Every Method
9:12 List Any Method
9:54 List Where Method
11:11 List SingleWhere Method
12:19 List Take Method
12:46 List Skip Method
14:24 List Expand Method

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#Flutter #Tutorial #JohannesMilke

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Thanks For Watching :-)

[faizulla]

Bro! How to retern & show on ListView this List "Bike" by/with new "horspover" value ... what you show on 14:33 by expand ???

[PaulMcKillop]

Thanks, Johannes. Straightforward, comprehensive, and logical.

[farhanahmad-bvmx]

It's a very helpful, fantastic explanation vedio

[oroshix]

Thanks Johannes for all your videos and their simple explanations.

Be careful, there is an error in your map explanation:
This is not the purpose of the .toList() at the end. The reason we generally need it is that .map() produces an Iterable type (MappedIterable) instead of a List type. And generally, widgets accept only List type. So if you want a List type, you have to convert it to a list with .toList(). In this case, because you use it with [...iterable], you don't need a .toList()


So if you only need an Iterable (not specifically a List), you don't have to put .toList(), it will produce a new object anyway. Moreover, this Iterable is lazy, so we can chain several calls without worry about performance.

[amirraja]

Love u So Much Brother You Save my Life Always

[farhanahmad-bvmx]

Lots of appreciation and love from India🇮🇳

[rv]

This was the best. Easy to understood method. Please create this kind of videos . It is very easy to understood everything. Other many videos are for advance user and not understandable by learner. I hope you got my point.

[gnrslashsp]

Man!! Your map explanation was not only the best that I saw but the only one that I understood!!! Finally I know how to use and what is the purpose of .toList() at the end!! thanks God, ops, thanks Viva la vida!!!

[essajamal]

Thank you so much for your video you have saved my from a big problem

[faisalfotoh]

Spread operator & Null-aware operator on Lists, Maps and Sets in Dart

Spread operator & Cascade Operator What is the function of each?
And when do we use each? also witch using with Map witch uing with list?

[rammehar]

Great tutorial. pls make a video on Navigation for web and mobile. e.g web has sidebar navgation on click again and again every route inserted in stack. this is the big problem in flutter for web

[kanatkoimaganbetov]

why is there no automatic translation into Russian (

[yonasmichael]

New to flutter here. I found something ready-made that I could use in my project, but I was having a hard time replicating it because I didn't understand the concept and the basics behind it. You made it crystal clear, and now I don't have to use the ready-made code; instead I can build it from scratch. Thank you so much. Of course, I subscribed and liked your video.

[gumdum]

Thanks for the info! Streightforward and helpful

[RajA-mecl]

Thank you, Johan. I really enjoyed this video.

[igorms]

how can I replace an item in a list with another item in the same index? (ie delete an item and place another item in the same place as it was)

[dreamerslab]

Awesome Content. To the point and useful.

[TrustAllah]

Great Brother, you are the best teacher I ever

[bijayaadhikari]

You are better and more efficient teacher. :)

[qadirkrimov]

Hello, bro. Do you have videos for testing? If you haven't, can you give me the source, please😊