{"id":10047,"date":"2023-11-28T21:25:13","date_gmt":"2023-11-28T13:25:13","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=10047"},"modified":"2023-11-30T19:16:36","modified_gmt":"2023-11-30T11:16:36","slug":"javascript-zhong-shen-me-shi-bao-zhuang-dui-xiang","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/javascript-zhong-shen-me-shi-bao-zhuang-dui-xiang\/","title":{"rendered":"JavaScript \u4e2d\u4ec0\u4e48\u662f\u5305\u88c5\u5bf9\u8c61(wrapper object)\uff1f"},"content":{"rendered":"<p>\u5728 JavaScript \u4e2d\uff0c\u5305\u88c5\u5bf9\u8c61\uff08Wrapper Object\uff09\u662f\u4e00\u79cd\u5c06\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff08\u5982\u5b57\u7b26\u4e32\u3001\u6570\u5b57\u3001\u5e03\u5c14\u503c\uff09\u8f6c\u6362\u4e3a\u5bf9\u5e94\u7684\u5bf9\u8c61\u7c7b\u578b\u7684\u673a\u5236\u3002JavaScript \u4e2d\u6709\u4e09\u79cd\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff1a\u5b57\u7b26\u4e32\u3001\u6570\u5b57\u548c\u5e03\u5c14\u503c\u3002\u5f53\u4f60\u5c1d\u8bd5\u8bbf\u95ee\u57fa\u672c\u6570\u636e\u7c7b\u578b\u7684\u5c5e\u6027\u6216\u8c03\u7528\u5176\u65b9\u6cd5\u65f6\uff0cJavaScript \u4f1a\u4e34\u65f6\u5c06\u8fd9\u4e9b\u57fa\u672c\u7c7b\u578b\u6570\u636e\u5305\u88c5\u6210\u5bf9\u5e94\u7684\u5bf9\u8c61\u7c7b\u578b\uff0c\u4ee5\u4fbf\u8bbf\u95ee\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/p>\n<h3><a id=\"%E4%BE%8B%E5%AD%90%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u4f8b\u5b50\uff1a<\/h3>\n<ol>\n<li><strong>\u5b57\u7b26\u4e32\u5305\u88c5\u5bf9\u8c61\uff1a<\/strong><\/li>\n<\/ol>\n<pre><code class=\"language-javascript\">let str = 'Hello';\nlet strObject = new String(str); \/\/ \u521b\u5efa\u5b57\u7b26\u4e32\u5305\u88c5\u5bf9\u8c61\n\nconsole.log(typeof str); \/\/ \u8f93\u51fa\uff1astring\nconsole.log(typeof strObject); \/\/ \u8f93\u51fa\uff1aobject\n\nconsole.log(str.length); \/\/ \u8f93\u51fa\uff1a5\nconsole.log(strObject.length); \/\/ \u8f93\u51fa\uff1a5\n<\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u5f53\u8bbf\u95ee\u57fa\u672c\u7c7b\u578b\u5b57\u7b26\u4e32 <code>str<\/code> \u7684 <code>length<\/code> \u5c5e\u6027\u65f6\uff0cJavaScript \u4f1a\u4e34\u65f6\u521b\u5efa\u4e00\u4e2a\u5b57\u7b26\u4e32\u5305\u88c5\u5bf9\u8c61 <code>strObject<\/code> \u5e76\u8c03\u7528\u5b83\u7684 <code>length<\/code> \u5c5e\u6027\u3002<\/p>\n<ol start=\"2\">\n<li><strong>\u6570\u5b57\u5305\u88c5\u5bf9\u8c61\u548c\u5e03\u5c14\u5305\u88c5\u5bf9\u8c61\uff1a<\/strong><\/li>\n<\/ol>\n<p>\u7c7b\u4f3c\u5730\uff0c\u6570\u5b57\u548c\u5e03\u5c14\u503c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u76f8\u540c\u7684\u65b9\u5f0f\u521b\u5efa\u5305\u88c5\u5bf9\u8c61\u3002<\/p>\n<pre><code class=\"language-javascript\">let num = 10;\nlet numObject = new Number(num); \/\/ \u521b\u5efa\u6570\u5b57\u5305\u88c5\u5bf9\u8c61\n\nlet bool = true;\nlet boolObject = new Boolean(bool); \/\/ \u521b\u5efa\u5e03\u5c14\u5305\u88c5\u5bf9\u8c61\n<\/code><\/pre>\n<p>\u5728\u8bbf\u95ee\u57fa\u672c\u6570\u636e\u7c7b\u578b\u7684\u5c5e\u6027\u6216\u8c03\u7528\u5176\u65b9\u6cd5\u65f6\uff0cJavaScript \u4f1a\u81ea\u52a8\u521b\u5efa\u4e34\u65f6\u7684\u5305\u88c5\u5bf9\u8c61\u6765\u6267\u884c\u64cd\u4f5c\uff0c\u4f46\u4e00\u65e6\u64cd\u4f5c\u5b8c\u6210\uff0c\u8fd9\u4e9b\u5305\u88c5\u5bf9\u8c61\u5c31\u4f1a\u88ab\u9500\u6bc1\uff0c\u8fd4\u56de\u539f\u59cb\u7684\u57fa\u672c\u6570\u636e\u7c7b\u578b\u503c\u3002\u56e0\u6b64\uff0c\u5305\u88c5\u5bf9\u8c61\u662f\u4e34\u65f6\u6027\u7684\uff0c\u4e0d\u540c\u4e8e\u5b9e\u9645\u521b\u5efa\u7684\u5bf9\u8c61\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 JavaScript \u4e2d\uff0c\u5305\u88c5\u5bf9\u8c61\uff08Wrapper Object\uff09\u662f\u4e00\u79cd\u5c06\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff08\u5982\u5b57\u7b26\u4e32\u3001\u6570\u5b57\u3001\u5e03 [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[115],"tags":[],"class_list":["post-10047","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10047","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=10047"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10047\/revisions"}],"predecessor-version":[{"id":13681,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10047\/revisions\/13681"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=10047"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=10047"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=10047"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}