errors

# Node.js

const err1 = new Error("some error");

console.log(err1);

class FooError extends Error {
  constructor(message) {
    super(message);
    this.name = "FooError";
    this.message = message;
  }

  toString() {
    return this.message;
  }
}

const err2 = new FooError("my custom error");

console.log(err2);

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Output

Error: some error
{ FooError: my custom error }

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# Go

package main

import (
	"errors"
	"fmt"
)

type FooError struct {
	s string
}

func (f *FooError) Error() string {
	return f.s
}

func NewFooError(s string) error {
	return &FooError{s}
}

func main() {
	err1 := errors.New("some error")
	fmt.Println(err1)

	err2 := NewFooError("my custom error")
	fmt.Println(err2)
}

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Output

some error
my custom error

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编辑

#Go #Node.js

上次更新: 2022/09/30, 11:34:22

← event emitter try/catch→