40 lines
925 B
Go
40 lines
925 B
Go
// Copyright © 2018 Inanc Gumus
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// Learn Go Programming Course
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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//
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// For more tutorials : https://learngoprogramming.com
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// In-person training : https://www.linkedin.com/in/inancgumus/
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// Follow me on twitter: https://twitter.com/inancgumus
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package main
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import "fmt"
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// REFACTORED VERSION
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// It uses well-defined names instead of magic numbers.
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// Thanks to the keyed elements and constants.
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func main() {
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const (
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ETH = 9 - iota
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WAN
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ICX
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// you can add more cryptocurrencies here
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// watch out the -1 index though!
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)
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rates := [...]float64{
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ETH: 25.5,
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WAN: 120.5,
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ICX: 20,
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// you can add more cryptocurrencies here
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}
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// uses well-defined names (ETH, WAN, ...) - good
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fmt.Printf("1 BTC is %g ETH\n", rates[ETH])
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fmt.Printf("1 BTC is %g WAN\n", rates[WAN])
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fmt.Printf("1 BTC is %g ICX\n", rates[ICX])
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fmt.Printf("%#v\n", rates)
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}
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