oinume https://blog.hatena.ne.jp/oinume/ oinume journal https://journal.lampetty.net/ Go タイトルの通りだけど知らなかったので。明示的に空のsliceやmapを作らなくてもいいのは楽だ。 http://play.golang.org/p/veOWHGDdcn package main import "fmt" func emptyMap() map[string]string { return nil } func emptySlice() []string { return nil } func main() { emptySlice := emptySlice() fmt.Printf("slice len = %d\n", len(emptySlice)) emptyMap … 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fjournal.lampetty.net%2Fentry%2Fnil-to-empty-slice-and-map" title="Goでnilなsliceやmapを返すと空のsliceやmapになる - oinume journal" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> http://ecx.images-amazon.com/images/I/51ZzoXpsmqL.jpg Hatena Blog https://hatena.blog 2014-09-15 02:58:25 rich https://journal.lampetty.net/entry/nil-to-empty-slice-and-map 1.0 100%