Basics of Dart and Flutter #FlutterDayMeetups Saudi Arabia (Day 5)

https://www.youtube.com/watch?v=xHvr2qNWs00&list=PL1TvzOUYd9IOv55qNoSRPMi4d9T8nOnuE&index=5

Transcript

1. BASICS OF DART By : RASHMI BHANDARI gohype.in
2. Syntax • File extension is .dart Syntax
3. Statically typed programing language
4. Dynamically typed programing language
5. Mobile App Web App Server
6. Commonly Used Editors • Android Studio • Visual Studio Code • Intellij IDEA • DartPad • CodePen
7. Data Types • Strings • Numbers • int • double • Booleans • Lists (Arrays) • Maps
8. ➢ All the data types are objects. ➢ Default values are null until we initialize the value .
10. Sound Null Safety • Why null safety? • Tech Preview - > Beta -> Stable • ? , ! , late are keyword • https://nullsafety.dartpad.dev/
11. Sound Null Safety Assign nullable expression to a variable that’s non nullable, use assertion operator(!)
12. Sound Null Safety
13. Variable Declaration & String interpolation
14. • final • const Constants
15. dynamic ,var and final
16. Functional Programming • Lambda Expression (FAT arrow) • Higher Order Function
17. Lambda Expression(FAT arrow) Type 1 : - Multi line of expression
18. Type 2 : - Lambda Expression(FAT arrow) Single line of expression
19. Higher Order Function • accept function as a parameter • can return a function • Or can do both
21. Closures • Within the closure , modify the values of variables present in the parent scope
22. Closures • closure is a function object that has access to the variable in its lexical scope , even when the function is used outside of its original scope
23. Exception Handling • try • catch • on • finally
24. Exception Handling
25. Exception Handling
26. Exception Handling
28. • Ahead Of Time (AOT) Compilation • Just In Time (JIT) Compilation • Well Ordered Animation • Single Layout Language • Ease of Use • Allocation and Garbage Collection • Null safety
29. Basic Widgets • Material App • Scaffold • Row • Column • Stack
30. • AppBar • Container • Icon • Image • Raised Button • FAB • Drawer
31. How to add drawer in flutter 1. Left Drawer 2. Right Drawer 3. Bottom Drawer
33. Reference • https://dart.dev • https://nullsafety.dartpad.dev/3d9c1769de7912c654bc5d132aff60ac • https://www.youtube.com/watch?list=PLjxrf2q8roU1rBlI9vz01K2324nzIhYgp&v=ZxSyZHq8gU • https://www.youtube.com/watch?v=DfZoyUDCbSg&list=PLlxmoA0rQ-LyHW9voBdNo4gEEIh0Sj G-q&index=37
34. Questions?
35. Thank You bh_rashmi