I have a few questions regarding the code below: export class Person { constructor(obj = { id: 0, name: '', lastName: '', eyeColor: '', age: 0 }) { this.id = obj.id; this.name = obj.name; this.lastName = obj.lastName; this.eyeColor = obj.eyeColor;…
I have a base class and another that extends it, how can I access fields in the constructor? class BaseModel { constructor() { console.log('no fields :(') console.log(this.fields) this.fields.map((field) => { field.label = field.label || field.name; }) } } class UserModel…
Scenario: $ cat lib.c #include <stdio.h> #define STR_(x) #x #define STR(x) STR_(x) #define CAT_(x,y) x##y #define CAT(x,y) CAT_(x,y) __attribute__((constructor)) void CAT(foo,)(void) { printf("foo" STR(N) " %pn", CAT(foo,)); } void CAT(bar,N)(void){ puts("bar" STR(N)); } $ cat main.c void barx(void); void bary(void);…
I have been wrapping my head around pseudoclassical inheritance in Javascript , and continuing on this topic I wanted to set an Static property/method , for a defined Constructor function. I want to avoid the class syntax for it. function…
The container always displays an error like that class HomePage extends StatelessWidget { @override Widget build(BuildContext context) { return Scaffold( body: Container( padding: EdgeInsets.symmetric(vertical: 30), width: double.infinity, decoration: const BoxDecoration( gradient: LinearGradient( begin: Alignment.topCenter, colors: [ Color.fromARGB(255, 9, 106, 185),…
class FoldersProvider extends ChangeNotifier { final _folders = <Directory>[]; FoldersProvider() { _addDefaultFoldersIfAccessible(); } // more code } _addDefaultFoldersIfAccessible is an async function. I normally should await the Future<void> result but I can't make the constructor async and I should still…
enter image description here class CircularlyLinkedList: def __init__(self): self.tail = None self.size = 0 . . When I ran the above code and entered: ls1 = CirculralyLinkedList() An error occurred: An expression must come after '('. This error did not…
I'm building multiple (different) UI pages with the same constructor. I'm using a statelful widget as my constructor and in my constractor I get user info data from Firestore. I want to to pass the Firebase data to the different…
Lastest version of canvas, discord.js and node.js. Here is the code: const attachment = new AttachmentBuilder(canvas.toBuffer("image/png"), { name: "DNI.png", }); await interaction.reply({ files: [attachment] }) }, The console/terminal says: "AttachmentBuilder is not a constructor" when I use the / command.
Is there any possibility to define or extend a class for a primitive type like string, number or array? For example i would like to define a Name-class which I can construct with new Name() and just returns the primitive…