48 lines
840 B
Go
48 lines
840 B
Go
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// For more tutorials: https://blog.learngoprogramming.com
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//
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// 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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package main
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import (
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"fmt"
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"strconv"
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"time"
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)
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type book struct {
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title string
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price money
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published interface{}
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}
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func (b book) print() {
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p := format(b.published)
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fmt.Printf("%-15s: %s - (%v)\n", b.title, b.price.string(), p)
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}
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func format(v interface{}) string {
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// book{title: "hobbit", price: 25},
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if v == nil {
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return "unknown"
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}
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var t int
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// book{title: "moby dick", price: 10, published: 118281600},
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if v, ok := v.(int); ok {
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t = v
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}
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// book{title: "odyssey", price: 15, published: "733622400"},
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if v, ok := v.(string); ok {
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t, _ = strconv.Atoi(v)
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}
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u := time.Unix(int64(t), 0)
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return u.String()
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}
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