{"id":1644,"date":"2024-11-10T08:03:02","date_gmt":"2024-11-10T00:03:02","guid":{"rendered":"https:\/\/fwq.ai\/blog\/1644\/"},"modified":"2024-11-10T08:03:02","modified_gmt":"2024-11-10T00:03:02","slug":"javascript-%e4%b8%ad%e7%9a%84-return-%e5%85%b3%e9%94%ae%e5%ad%97%ef%bc%9a%e5%ae%83%e8%83%bd%e5%81%9a%e4%ba%9b%e4%bb%80%e4%b9%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/1644\/","title":{"rendered":"JavaScript \u4e2d\u7684 return \u5173\u952e\u5b57\uff1a\u5b83\u80fd\u505a\u4e9b\u4ec0\u4e48\uff1f"},"content":{"rendered":"

\"JavaScript<\/p>\n

\u6df1\u5165\u7406\u89e3 return \u7684\u7528\u6cd5<\/strong><\/p>\n

\u5728 javascript \u4e2d\uff0creturn \u662f\u4e00\u79cd\u5173\u952e\u5b57\uff0c\u7528\u4e8e\u4ece\u51fd\u6570\u4e2d\u8fd4\u56de\u4e00\u4e2a\u503c\u3002<\/p>\n

\u57fa\u672c\u7528\u6cd5\uff1a<\/strong><\/p>\n

return \u6700\u57fa\u672c\u7684\u7528\u6cd5\u662f\u8fd4\u56de\u51fd\u6570\u4e2d\u7684\u503c\u3002\u5f53\u4e00\u4e2a\u51fd\u6570\u88ab\u8c03\u7528\u65f6\uff0c\u6267\u884c\u5c06\u4e00\u76f4\u6301\u7eed\u5230\u9047\u5230 return \u8bed\u53e5\uff0c\u7136\u540e\u51fd\u6570\u5c06\u8fd4\u56de\u6307\u5b9a\u7684\u8fd4\u56de\u503c\u3002\u5982\u679c\u4e0d\u6307\u5b9a\u8fd4\u56de\u503c\uff0c\u5219\u9690\u5f0f\u8fd4\u56de undefined\u3002<\/p>\n

\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n

\u4f8b\u5982\uff1a<\/p>\n

function sum(a, b) {\n  return a + b;\n}\n\nconst result = sum(5, 10); \/\/ result = 15<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u7ec8\u6b62\u51fd\u6570\u6267\u884c\uff1a<\/strong><\/p>\n
return \u8fd8\u7528\u4e8e\u7ec8\u6b62\u51fd\u6570\u7684\u6267\u884c\u3002\u5f53\u9047\u5230 return \u8bed\u53e5\u65f6\uff0c\u51fd\u6570\u5c06\u7acb\u5373\u8fd4\u56de\u3002\u968f\u540e\u4ee3\u7801\u5c06\u7ee7\u7eed\u6267\u884c\u51fd\u6570\u5916\u90e8\u7684\u4ee3\u7801\u3002<\/p>\n
\u963b\u6b62\uff1a<\/strong><\/p>\n
\u5728 javascript \u4e2d\uff0c\u4e8b\u4ef6\u53ef\u4ee5\u4ece\u4e00\u4e2a\u5143\u7d20\u4f20\u64ad\u5230\u5176\u7236\u5143\u7d20\uff0c\u79f0\u4e3a\u4e8b\u4ef6\u5192\u6ce1\u3002return false \u53ef\u4ee5\u963b\u6b62\u4e8b\u4ef6\u5192\u6ce1\uff0c\u9632\u6b62\u5b83\u4f20\u64ad\u5230\u7236\u5143\u7d20\u3002<\/p>\n
\u95ed\u5305\u4e2d\u7684\u5e94\u7528\uff1a<\/strong><\/p>\n
\u95ed\u5305\u662f\u4e00\u79cd\u5728 javascript \u4e2d\u521b\u5efa\u79c1\u6709\u53d8\u91cf\u548c\u65b9\u6cd5\u7684\u6a21\u5f0f\u3002return \u5728\u95ed\u5305\u4e2d\u7528\u4e8e\u5c06\u53d8\u91cf\u548c\u65b9\u6cd5\u5c01\u88c5\u5728\u7acb\u5373\u6267\u884c\u51fd\u6570\u8868\u8fbe\u5f0f (iife) \u4e2d\uff0c\u4ece\u800c\u521b\u5efa\u79c1\u6709\u3002<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n
const createCounter = () => {\n  let count = 0;\n\n  return () => {\n    return ++count;\n  };\n};\n\nconst counter = createCounter();\n\nconsole.log(counter()); \/\/ 1\nconsole.log(counter()); \/\/ 2<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u603b\u800c\u8a00\u4e4b\uff0creturn \u5173\u952e\u5b57\u5728 javascript \u4e2d\u6709\u7740\u591a\u91cd\u7684\u7528\u6cd5\uff0c\u5305\u62ec\u7ec8\u6b62\u51fd\u6570\u6267\u884c\u3001\u8fd4\u56de\u51fd\u6570\u503c\u3001\u963b\u6b62\u4e8b\u4ef6\u5192\u6ce1\u548c\u521b\u5efa\u95ed\u5305\u573a\u666f\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662fJavaScript \u4e2d\u7684 return \u5173\u952e\u5b57\uff1a\u5b83\u80fd\u505a\u4e9b\u4ec0\u4e48\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6df1\u5165\u7406\u89e3 return \u7684\u7528\u6cd5 \u5728 javascript \u4e2d\uff0creturn \u662f\u4e00\u79cd\u5173\u952e\u5b57\uff0c\u7528\u4e8e\u4ece\u51fd\u6570\u4e2d\u8fd4\u56de\u4e00\u4e2a\u503c\u3002 \u57fa\u672c\u7528\u6cd5\uff1a return \u6700\u57fa\u672c\u7684\u7528\u6cd5\u662f\u8fd4\u56de\u51fd\u6570\u4e2d\u7684\u503c\u3002\u5f53\u4e00\u4e2a\u51fd\u6570\u88ab\u8c03\u7528\u65f6\uff0c\u6267\u884c\u5c06\u4e00\u76f4\u6301\u7eed\u5230\u9047\u5230 return \u8bed\u53e5\uff0c\u7136\u540e\u51fd\u6570\u5c06\u8fd4\u56de\u6307\u5b9a\u7684\u8fd4\u56de\u503c\u3002\u5982\u679c\u4e0d\u6307\u5b9a\u8fd4\u56de\u503c\uff0c\u5219\u9690\u5f0f\u8fd4\u56de undefined\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u4f8b\u5982\uff1a function sum(a, b) { return a + b; } const result = sum(5, 10); \/\/ result = 15 \u767b\u5f55\u540e\u590d\u5236 \u7ec8\u6b62\u51fd\u6570\u6267\u884c\uff1a return \u8fd8\u7528\u4e8e\u7ec8\u6b62\u51fd\u6570\u7684\u6267\u884c\u3002\u5f53\u9047\u5230 return \u8bed\u53e5\u65f6\uff0c\u51fd\u6570\u5c06\u7acb\u5373\u8fd4\u56de\u3002\u968f\u540e\u4ee3\u7801\u5c06\u7ee7\u7eed\u6267\u884c\u51fd\u6570\u5916\u90e8\u7684\u4ee3\u7801\u3002 \u963b\u6b62\uff1a \u5728 javascript \u4e2d\uff0c\u4e8b\u4ef6\u53ef\u4ee5\u4ece\u4e00\u4e2a\u5143\u7d20\u4f20\u64ad\u5230\u5176\u7236\u5143\u7d20\uff0c\u79f0\u4e3a\u4e8b\u4ef6\u5192\u6ce1\u3002return false \u53ef\u4ee5\u963b\u6b62\u4e8b\u4ef6\u5192\u6ce1\uff0c\u9632\u6b62\u5b83\u4f20\u64ad\u5230\u7236\u5143\u7d20\u3002 \u95ed\u5305\u4e2d\u7684\u5e94\u7528\uff1a \u95ed\u5305\u662f\u4e00\u79cd\u5728 javascript \u4e2d\u521b\u5efa\u79c1\u6709\u53d8\u91cf\u548c\u65b9\u6cd5\u7684\u6a21\u5f0f\u3002return \u5728\u95ed\u5305\u4e2d\u7528\u4e8e\u5c06\u53d8\u91cf\u548c\u65b9\u6cd5\u5c01\u88c5\u5728\u7acb\u5373\u6267\u884c\u51fd\u6570\u8868\u8fbe\u5f0f (iife) \u4e2d\uff0c\u4ece\u800c\u521b\u5efa\u79c1\u6709\u3002 \u4f8b\u5982\uff1a const createCounter […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-1644","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/1644","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=1644"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/1644\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=1644"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=1644"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=1644"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}