{"id":873,"date":"2024-11-29T09:05:31","date_gmt":"2024-11-29T00:05:31","guid":{"rendered":"https:\/\/dnetcore.ohwaki.jp\/wordpress\/?p=873"},"modified":"2024-11-29T13:46:11","modified_gmt":"2024-11-29T04:46:11","slug":"c13-params%e3%82%b3%e3%83%ac%e3%82%af%e3%82%b7%e3%83%a7%e3%83%b3","status":"publish","type":"post","link":"https:\/\/sumomo.ohwaki.jp\/wordpress\/?p=873","title":{"rendered":"C#13 params\u30b3\u30ec\u30af\u30b7\u30e7\u30f3"},"content":{"rendered":"\n

.NET9.0\u3067C#\u306fVersion 13\u306b\u306a\u3063\u305f\u3002
Version 13\u3067\u306e\u65b0\u6a5f\u80fd\u306f\u4f59\u308a\u76ee\u7acb\u3063\u305f\u3082\u306e\u306f\u7121\u3044\u304c\u3001
params\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306f\u4f7f\u3048\u305d\u3046\u3060\u3002<\/p>\n\n\n\n

params\u3068\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u540c\u3058\u578b\u306e\u5f15\u6570\u3092\u53ef\u5909\u306b\u3059\u308b\u3082\u306e\u3067\u3001C# 12\u307e\u3067\u3060\u3068\u3001
\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u611f\u3058\u3067\u3001\u914d\u5217\u3057\u304b\u6307\u5b9a\u3067\u304d\u306a\u304b\u3063\u305f\u3002\u3002<\/p>\n\n\n\n

T f(T1 p1, T2 p2, ... , params T3[] p) {}<\/code><\/pre><\/div>\n\n\n\n
C#13\u304b\u3089\u306f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u5168\u822c\u304c\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u3002
\u3053\u308c\u306b\u3088\u308a\u3069\u306e\u3088\u3046\u306a\u5229\u70b9\u304c\u3042\u308b\u304b\u3068\u3044\u3046\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30d1\u30bf\u30fc\u30f3\u3092\u5168\u30661\u3064\u306e\u5b9a\u7fa9\u3067\u307e\u304b\u306a\u3048\u308b\u3088\u3046\u306b\u306a\u308b\u3053\u3068\u3060\u3002<\/p>\n\n\n\n
> string JoinString(string delim , params IEnumerable<string> prm) => string.Join(delim,prm);\n> JoinString("," , "Paul","John","George","Ringo")\t\t\/\/ \u5f15\u6570\u306e\u5217\u6319\n"Paul,John,George,Ringo"\n> JoinString("," , ["Paul","John","George","Ringo"])\t\/\/ \u914d\u5217\n"Paul,John,George,Ringo"\n>List<string> lst = ["Paul","John","George","Ringo"];\n> JoinString("," , lst)\t\t\t\t\t\t\t\t\t\/\/ \u30ea\u30b9\u30c8\n"Paul,John,George,Ringo"\n>JoinString("," , lst.Where(v=>v.Contains("o")))\t\t\/\/ \u30af\u30a8\u30ea\n"John,George,Ringo"<\/code><\/pre><\/div>\n\n\n\n
\u30c1\u30e7\u30c3\u30c8\u4f7f\u3048\u305d\u3046\u306a\u306e\u3067\u30e1\u30e2\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
.NET9.0\u3067C#\u306fVersion 13\u306b\u306a\u3063\u305f\u3002Version 13\u3067\u306e\u65b0\u6a5f … \u7d9a\u304d\u3092\u8aad\u3080 →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18,9,4],"tags":[],"class_list":["post-873","post","type-post","status-publish","format-standard","hentry","category-net","category-c","category-4"],"_links":{"self":[{"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/873","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=873"}],"version-history":[{"count":5,"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/873\/revisions"}],"predecessor-version":[{"id":878,"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/873\/revisions\/878"}],"wp:attachment":[{"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=873"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=873"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sumomo.ohwaki.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=873"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}