{"id":4536,"date":"2023-01-04T16:02:03","date_gmt":"2023-01-04T08:02:03","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=4536"},"modified":"2023-01-04T16:02:03","modified_gmt":"2023-01-04T08:02:03","slug":"%e5%ad%b8%e7%bf%92react%e5%be%aa%e7%92%b0map%e7%9a%84%e5%9f%ba%e7%a4%8e%e7%9f%a5%e8%ad%98","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/react-js\/%e5%ad%b8%e7%bf%92react%e5%be%aa%e7%92%b0map%e7%9a%84%e5%9f%ba%e7%a4%8e%e7%9f%a5%e8%ad%98\/","title":{"rendered":"\u5b78\u7fd2React\u5faa\u74b0(map)\u7684\u57fa\u790e\u77e5\u8b58"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"React, React \u5faa\u74b0, React.js, map\"><\/p>\n<h1>\u4ec0\u9ebc\u662f React \u5faa\u74b0(map)\uff1f<\/h1>\n<p>React \u5faa\u74b0(map)\u662f React.js \u4e2d\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u529f\u80fd\uff0c\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u5c07\u4e00\u500b\u9663\u5217\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u90fd\u8f49\u63db\u6210\u4e00\u500b React \u5143\u4ef6\uff0c\u4e26\u5c07\u5b83\u5011\u6e32\u67d3\u51fa\u4f86\u3002\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u5feb\u901f\u5730\u5c07\u4e00\u500b\u9663\u5217\u4e2d\u7684\u8cc7\u6599\u8f49\u63db\u6210 React \u5143\u4ef6\uff0c\u800c\u4e0d\u9700\u8981\u91cd\u8907\u5730\u4f7f\u7528\u76f8\u540c\u7684\u7a0b\u5f0f\u78bc\u3002<\/p>\n<p><!--more--><\/p>\n<h2>React \u5faa\u74b0(map)\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>React \u5faa\u74b0(map)\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-js line-numbers\">array.map(function(item, index) {\n  \/\/ \u5c0d\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u7684\u7a0b\u5f0f\u78bc\n});\n<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>array<\/code> \u662f\u8981\u88ab\u8655\u7406\u7684\u9663\u5217\uff0c<code>function<\/code> \u662f\u4e00\u500b\u56de\u547c\u51fd\u5f0f\uff0c\u5b83\u6703\u5c0d\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u6307\u5b9a\u7684\u7a0b\u5f0f\u78bc\uff0c<code>item<\/code> \u662f\u9663\u5217\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\uff0c<code>index<\/code> \u662f\u9663\u5217\u4e2d\u6bcf\u500b\u5143\u7d20\u7684\u7d22\u5f15\u503c\u3002<\/p>\n<h2>\u4f7f\u7528 React \u5faa\u74b0(map)<\/h2>\n<p>\u73fe\u5728\uff0c\u6211\u5011\u4f86\u770b\u4e00\u500b\u7c21\u55ae\u7684\u7bc4\u4f8b\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u9663\u5217\uff0c\u88e1\u9762\u6709\u4e00\u4e9b\u5b57\u4e32\uff1a<\/p>\n<pre><code class=\"language-js line-numbers\">const items = [\"Apple\", \"Banana\", \"Orange\"];\n<\/code><\/pre>\n<p>\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 React \u5faa\u74b0(map) \u4f86\u5c07\u9019\u500b\u9663\u5217\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u90fd\u8f49\u63db\u6210\u4e00\u500b React \u5143\u4ef6\uff1a<\/p>\n<pre><code class=\"language-js line-numbers\">const listItems = items.map(item =&gt; &lt;li&gt;{item}&lt;\/li&gt;);\n<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u6211\u5011\u5c31\u53ef\u4ee5\u5c07\u9019\u500b\u9663\u5217\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u90fd\u8f49\u63db\u6210\u4e00\u500b React \u5143\u4ef6\uff0c\u4e26\u5c07\u5b83\u5011\u6e32\u67d3\u51fa\u4f86\uff1a<\/p>\n<pre><code class=\"language-js line-numbers\">&lt;ul&gt;\n  {listItems}\n&lt;\/ul&gt;\n<\/code><\/pre>\n<h2>\u7e3d\u7d50<\/h2>\n<p>React \u5faa\u74b0(map) \u662f React.js \u4e2d\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u529f\u80fd\uff0c\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u5c07\u4e00\u500b\u9663\u5217\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u90fd\u8f49\u63db\u6210\u4e00\u500b React \u5143\u4ef6\uff0c\u4e26\u5c07\u5b83\u5011\u6e32\u67d3\u51fa\u4f86\u3002\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u5feb\u901f\u5730\u5c07\u4e00\u500b\u9663\u5217\u4e2d\u7684\u8cc7\u6599\u8f49\u63db\u6210 React \u5143\u4ef6\uff0c\u800c\u4e0d\u9700\u8981\u91cd\u8907\u5730\u4f7f\u7528\u76f8\u540c\u7684\u7a0b\u5f0f\u78bc\u3002<\/p>\n<p><span style=\"color: #ff0000; font-weight: bold;\">React \u5faa\u74b0(map) \u662f React.js \u4e2d\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u529f\u80fd\uff0c\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u5feb\u901f\u5730\u5c07\u4e00\u500b\u9663\u5217\u4e2d\u7684\u8cc7\u6599\u8f49\u63db\u6210 React \u5143\u4ef6\uff0c\u800c\u4e0d\u9700\u8981\u91cd\u8907\u5730\u4f7f\u7528\u76f8\u540c\u7684\u7a0b\u5f0f\u78bc\u3002<\/span>\u5b83\u7684\u57fa\u672c\u8a9e\u6cd5\u662f <code>array.map(function(item, index) { \/\/ \u5c0d\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u7684\u7a0b\u5f0f\u78bc });<\/code>\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u5b83\u4f86\u5c07\u4e00\u500b\u9663\u5217\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u90fd\u8f49\u63db\u6210\u4e00\u500b React \u5143\u4ef6\uff0c\u4e26\u5c07\u5b83\u5011\u6e32\u67d3\u51fa\u4f86\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u6587\u5c07\u4ecb\u7d39React\u5faa\u74b0(map)\u7684\u57fa\u790e\u77e5\u8b58\uff0c\u8b93\u8b80\u8005\u80fd\u5920\u66f4\u52a0\u4e86\u89e3React\u4e2d\u7684map\u51fd\u6578\uff0c\u4e26\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528\u5b83\u4f86\u6e32\u67d3\u5217\u8868\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[184,183],"tags":[182,181],"class_list":["post-4536","post","type-post","status-publish","format-standard","hentry","category-react","category-react-js","tag-react","tag-react-js"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-1ba","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4536","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=4536"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4536\/revisions"}],"predecessor-version":[{"id":4537,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4536\/revisions\/4537"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=4536"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=4536"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=4536"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}