{"title":"Go \u3067 Perl \u306e defined-or \u3084 JS \u306enull\u5408\u4f53\u6f14\u7b97\u5b50\u3068\u540c\u3058\u3088\u3046\u306a\u3053\u3068\u3092\u3057\u305f\u3044","categories":["\u6280\u8853"],"author_name":"rokuokun","provider_url":"https://hatena.blog","published":"2025-03-25 01:36:10","blog_url":"https://blog.km3.dev/","provider_name":"Hatena Blog","url":"https://blog.km3.dev/entry/2025/03/25/013610","image_url":null,"version":"1.0","description":"\u4f55\u304c\u3057\u305f\u3044\u304b Perl \u3084 JavaScript / TypeScript \u306a\u3069\u69d8\u3005\u306a\u8a00\u8a9e\u306b\u5de6\u8fba\u304c null / undefined \u306a\u3089\u53f3\u8fba\u3092\u8a55\u4fa1\u3059\u308b\u3068\u3044\u3046\u3088\u3046\u306a\u6f14\u7b97\u5b50\u304c\u5b58\u5728\u3057\u307e\u3059\u3002 # Perl my $page = $input->{page} // '1'; // JavaScript const page = input.page ?? 1; \u3053\u308c\u3068\u540c\u3058\u3088\u3046\u306a\u3053\u3068\u3092 Go \u3067\u66f8\u304d\u307e\u3059\u3002 \u540c\u3058\u3068\u3044\u3063\u3066\u3082\u6f14\u7b97\u5b50\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u3044\u306e\u3067\u95a2\u6570\u3092\u7528\u610f\u3057\u307e\u3059\u3002 \u666e\u901a\u306b\u3084\u308b \u3044\u3064\u3082\u901a\u308a\u306b\u5165\u529b\u5024\u304c nil \u3067\u306a\u3044\u306a\u3089\u5024\u3092\u30bb\u30c3\u30c8\u3059\u308b\u3068\u3044\u3046\u51e6\u7406\u3092\u66f8\u304d\u307e\u3059\u3002 func main() { var inp\u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.km3.dev%2Fentry%2F2025%2F03%2F25%2F013610\" title=\"Go \u3067 Perl \u306e defined-or \u3084 JS \u306enull\u5408\u4f53\u6f14\u7b97\u5b50\u3068\u540c\u3058\u3088\u3046\u306a\u3053\u3068\u3092\u3057\u305f\u3044 - \u30cf\u30f3\u30c9\u30eb\u30cd\u30fc\u30e0\u306e\u656c\u79f0\u306f\u7701\u7565\u3067\u304d\u307e\u3059\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","width":"100%","type":"rich","author_url":"https://blog.hatena.ne.jp/rokuokun/","blog_title":"\u30cf\u30f3\u30c9\u30eb\u30cd\u30fc\u30e0\u306e\u656c\u79f0\u306f\u7701\u7565\u3067\u304d\u307e\u3059","height":"190"}