31 lines
587 B
Go
31 lines
587 B
Go
|
// For more tutorials: https://blog.learngoprogramming.com
|
||
|
|
//
|
||
|
|
// Copyright © 2018 Inanc Gumus
|
||
|
|
// Learn Go Programming Course
|
||
|
|
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
|
||
|
|
//
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
import "fmt"
|
||
|
|
|
||
|
|
// REFACTORED VERSION
|
||
|
|
// It uses well-defined names instead of magic numbers.
|
||
|
|
// Thanks to keyed elements and constants.
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
const (
|
||
|
|
ETH = iota
|
||
|
|
WAN
|
||
|
|
)
|
||
|
|
|
||
|
|
rates := [...]float64{
|
||
|
|
ETH: 25.5,
|
||
|
|
WAN: 120.5,
|
||
|
|
}
|
||
|
|
|
||
|
|
// uses well-defined names (ETH, WAN, ...) - good
|
||
|
|
fmt.Printf("1 BTC is %g ETH\n", rates[ETH])
|
||
|
|
fmt.Printf("1 BTC is %g WAN\n", rates[WAN])
|
||
|
|
}
|