{"id":208345,"date":"2025-07-08T08:14:11","date_gmt":"2025-07-08T00:14:11","guid":{"rendered":"https:\/\/server.hk\/cnblog\/208345\/"},"modified":"2025-07-08T08:14:11","modified_gmt":"2025-07-08T00:14:11","slug":"%e5%b0%86%e5%a4%9a%e4%b8%aa%e5%8f%82%e6%95%b0%e6%98%a0%e5%b0%84%e5%88%b0%e5%8d%95%e4%b8%aa%e5%8f%af%e5%8f%98%e5%8f%82%e6%95%b0%e7%9a%84%e4%b9%a0%e6%83%af%e7%94%a8%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208345\/","title":{"rendered":"\u5c06\u591a\u4e2a\u201c\u53c2\u6570\u201d\u6620\u5c04\u5230\u5355\u4e2a\u53ef\u53d8\u53c2\u6570\u7684\u4e60\u60ef\u7528\u6cd5"},"content":{"rendered":"<p><b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>\u5c06\u591a\u4e2a\u201c\u53c2\u6570\u201d\u6620\u5c04\u5230\u5355\u4e2a\u53ef\u53d8\u53c2\u6570\u7684\u4e60\u60ef\u7528\u6cd5<\/span><\/p>\n<p><span>\u6765\u6e90\uff1astackoverflow<\/span><br \/>\n<span>2024-05-02 08:12:35<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u6765\u5230\u7684\u5927\u5bb6\uff0c\u76f8\u4fe1\u90fd\u662f\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5e0c\u671b\u5728\u8fd9\u91cc\u5b66\u4e60Golang\u76f8\u5173\u7f16\u7a0b\u77e5\u8bc6\u3002\u4e0b\u9762\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u5e26\u5927\u5bb6\u804a\u804a\u300a\u5c06\u591a\u4e2a\u201c\u53c2\u6570\u201d\u6620\u5c04\u5230\u5355\u4e2a\u53ef\u53d8\u53c2\u6570\u7684\u4e60\u60ef\u7528\u6cd5\u300b\uff0c\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n<p> \u95ee\u9898\u5185\u5bb9<br \/>\n <\/p>\n<p>\u6709\u6ca1\u6709\u529e\u6cd5\u5728 golang \u4e2d\u4f7f\u7528\u53ef\u53d8\u53c2\u6570\u7684\u51fd\u6570\u4e2d\u4f7f\u7528splatted\u53c2\u6570\u548c\u7b80\u5355\u53c2\u6570\uff08\u5b9a\u4e49\u5982\u4e0b\uff09\u7684\u7ec4\u5408\uff1f\u5982\u679c\u6ca1\u6709\uff0c\u662f\u5426\u6709\u4e00\u4e2a\u4f17\u6240\u5468\u77e5\u7684\u4e60\u8bed\u53ef\u4ee5\u8fd1\u4f3c\u8fd9\u4e2a\u529f\u80fd\uff1f\u5982\u679c\u53ef\u80fd\u7684\u8bdd\uff0c\u662f\u5426\u6709\u4e00\u4e2a\u7c7b\u4f3c\u4e8e\u6b64\u529f\u80fd\u4e14\u4e0d\u9700\u8981\u91cd\u590d\u7c7b\u578b\u540d\u79f0\u7684\u4e60\u60ef\u7528\u6cd5\uff1f<\/p>\n<p>\u5047\u8bbe\u6211\u5728 golang \u4e2d\u6709\u4e00\u4e2a\u5e26\u6709 <code>...t<\/code> \u7c7b\u578b\u7684\u53ef\u53d8\u53c2\u6570\u7684\u51fd\u6570\u3002 \u60a8\u5728\u547c\u53eb\u7ad9\u70b9\u7684\u9009\u9879\u4f3c\u4e4e\u4ec5\u9650\u4e8e\uff1a<\/p>\n<ul>\n<li>\u591a\u4e2a<em>\u7b80\u5355\u53c2\u6570<\/em>\uff0c\u6bcf\u4e2a\u7c7b\u578b\u4e3a<code>t<\/code>\uff0c\u5373<code>f(\u2026\u2026 x1, x2, x3 \u2026\u2026)<\/code><\/li>\n<li>\u5355\u4e2a <code>[]t<\/code> \u7c7b\u578b\u7684<em>splatted\u53c2\u6570<\/em>\uff0c\u5373 <code>f(\u2026\u2026 ...xs \u2026\u2026)<\/code><\/li>\n<\/ul>\n<p>\u5728 python \u7b49\u5176\u4ed6\u4e00\u4e9b\u8bed\u8a00\u4e2d\uff0c\u53ef\u4ee5<em>\u6355\u83b7<\/em>\u7b80\u5355\u53c2\u6570\u548c\u5e26\u6709\u53ef\u53d8\u53c2\u6570\u7684\u5c55\u5f00\u53c2\u6570\u7684\u7ec4\u5408\uff1a<\/p>\n<pre>$ python\n&gt;&gt;&gt; def foo(*args): return args\n... \n&gt;&gt;&gt; foo(1, 2, *[3, 4])\n(1, 2, 3, 4)<\/pre>\n<p>\u4f46\u662f\uff0c\u540c\u6837\u7684\u4e8b\u60c5\u4f3c\u4e4e\u5728 go \u4e2d\u4e0d\u8d77\u4f5c\u7528\u3002 <\/p>\n<pre>\/\/ splat.go\npackage main\n\nimport \"os\"\nimport \"fmt\"\n\nfunc write(args ...string) {\n        for _, item := range args {\n                fmt.printf(\"%s\\n\", item)\n        }\n}\n\nfunc main() {\n        write(\"foobarbaz\", os.args[1:]...)\n}<\/pre>\n<p>\u4ece\u9519\u8bef\u6d88\u606f\u4e2d\u53ef\u4ee5\u6e05\u695a\u5730\u770b\u51fa\uff0csplatted \u53c2\u6570\u548c\u7b80\u5355\u53c2\u6570\u6ca1\u6709\u6620\u5c04\u5230\u540c\u4e00\u53c2\u6570\u3002<\/p>\n<pre>$ go run splat.go \n# command-line-arguments\n.\/splat.go:14: too many arguments in call to write<\/pre>\n<p> <\/p>\n<h2>\u89e3\u51b3\u65b9\u6848<\/h2>\n<p> <\/p>\n<p>\u4f7f\u7528\u6240\u6709\u53c2\u6570\u521b\u5efa\u4e00\u4e2a\u5207\u7247\u5e76\u5c55\u5f00\u8be5\u5207\u7247\u3002<\/p>\n<pre>write(append([]string{\"foobarbaz\"}, os.args[1:]...)...)<\/pre>\n<p>\u5982\u679c <code>string, []string<\/code> \u6a21\u5f0f\u5728\u5e94\u7528\u7a0b\u5e8f\u4ee3\u7801\u4e2d\u5f88\u5e38\u89c1\uff0c\u5219\u8003\u8651\u7f16\u5199\u4e00\u4e2a\u51fd\u6570\u6765\u7b80\u5316\u8c03\u7528\u7ad9\u70b9\u7684\u4ee3\u7801\uff1a<\/p>\n<pre>func stringargs(s string, args []string) []string { \n   return append([]string{s}, args...)\n}\n\n...\n\nwrite(stringargs(\"foobarbaz\", os.args[1:])...)<\/pre>\n<p>\u6216<\/p>\n<pre>func writeStringArgs(s string, args []string) {\n    write(append([]string{\"foobarbaz\"}, os.Args[1:]...)...)\n}\n\n...\n\nwriteStringArgs(s, os.Args[1:])<\/pre>\n<p>\u4eca\u5929\u5173\u4e8e\u300a\u5c06\u591a\u4e2a\u201c\u53c2\u6570\u201d\u6620\u5c04\u5230\u5355\u4e2a\u53ef\u53d8\u53c2\u6570\u7684\u4e60\u60ef\u7528\u6cd5\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u524d\u4f4d\u7f6e\uff1a &gt; &gt; &#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-208345","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208345","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=208345"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208345\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=208345"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=208345"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=208345"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}