Flutter list function execute error management-CodePudding

in a flutter, I execute multiple functions on initState. Like this:-

  @override
  void initState() {
    super.initState();
    function1();
    function2();
    function3();
    function4();
  }

in case the function2() has some errors it affects function3(),function4() also. How do we avoid this?

CodePudding user response：

You can call try in each functions to avoid getting stop incase of getting error:

void function1(){
    try {
      //put you code hear
    } catch (e) {
      print("e = $e");
    }
}

CodePudding user response：

You have to use try & catch but, there is a way to write only at one place !

create a extension on Function to call it & absorb the error if any occures in it.

Here is a example:

import 'dart:developer';

void f1() => print('f1');

void f2() => throw 'STOP';

void f3() => print('f3');

extension FunctionUtils on Function {
  void callAndAbsorbError() {
    try {
      this.call();
    } catch (e, st) {
      log("Error in $this", error: e, stackTrace: st);
    }
  }
}

void main(List<String> arguments) {
  f1.callAndAbsorbError();
  f2.callAndAbsorbError();
  f3.callAndAbsorbError();
}

This way you don't need to write try catch in every function you create. AND all your functions will execute for sure.

More about extensions : vandad's blog