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result's Introduction

result Docs

Go-generics result module inspired by rust.

Avoid ifelse, handle result with chain methods, will you choose her?

Note: Migrated to gust.

Go Version

go≥1.18

Example

func ExampleAndThen() {
	var divide = func(i, j float32) Result[float32] {
		if j == 0 {
			return Err[float32]("j can not be 0")
		}
		return Ok(i / j)
	}
	var ret float32 = divide(1, 2).AndThen(func(i float32) Result[float32] {
		return Ok(i * 10)
	}).Unwrap()
	fmt.Println(ret)
	// Output:
	// 5
}
func ExampleDefaultValue() {
	const def int = 10

	// before
	i, err := strconv.Atoi("1")
	if err != nil {
		i = def
	}
	fmt.Println(i * 2)

	// now
	fmt.Println(Wrap(strconv.Atoi("1")).UnwrapOr(def) * 2)

	// Output:
	// 2
	// 2
}

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