{"id":632,"date":"2019-07-24T16:01:11","date_gmt":"2019-07-24T08:01:11","guid":{"rendered":"http:\/\/blog.xrhoujie.com\/?p=632"},"modified":"2019-11-24T16:02:40","modified_gmt":"2019-11-24T08:02:40","slug":"javascript-object%e7%9b%b8%e5%85%b3%e5%9f%ba%e7%a1%80%e5%b1%9e%e6%80%a7%e6%96%b9%e6%b3%95%e8%bd%ac","status":"publish","type":"post","link":"http:\/\/blog.xrhoujie.com\/?p=632","title":{"rendered":"JavaScript-Object\u76f8\u5173\u57fa\u7840\u5c5e\u6027\u65b9\u6cd5(\u8f6c)"},"content":{"rendered":"

Object<\/h3>\n

\u6211\u4eec\u5e38\u8bf4\u7684\u5bf9\u8c61\uff0c\u5b57\u5178\uff0c\u952e\u503c\u5bf9\u3002\u6570\u636e\u50a8\u5b58\u4e0b\u6765\u662f\u6ca1\u6709\u524d\u540e\u987a\u5e8f\u7684\uff0c\u6216\u8bb8\u4f60\u4f1a\u5728\u76f8\u540c\u7684\u8fd0\u884c\u73af\u5883\u4e0b\uff0c\u6bcf\u6b21\u6253\u5370\u90fd\u662f\u4e00\u6837\u7684\u987a\u5e8f\uff0c\u4f46\u662f\u4e8b\u5b9e\u4e0a\u5b83\u5c31\u662f\u00a0\u65e0\u5e8f<\/strong>\u00a0\u7684\uff0c\u5207\u8bb0\u3002<\/p>\n

\u521b\u5efa\u4e0e\u83b7\u53d6\u5982\u4e0b\uff1a<\/p>\n

var<\/span> obj <\/span>=<\/span> {<\/span>\r\n    a<\/span>:<\/span> 1<\/span>,<\/span>\r\n    b<\/span>:<\/span> 2<\/span>\r\n}<\/span>\r\n\r\nobj<\/span>.<\/span>a <\/span>\/\/ 1<\/span>\r\nobj<\/span>[<\/span>b<\/span>]<\/span> \/\/ 2<\/span><\/code><\/pre>\n
\u4ee5\u4e0a\u4e24\u79cd\u83b7\u53d6\u65b9\u5f0f\u8bf7\u6ce8\u610f\uff0c\u7b2c\u4e00\u79cd\u662f\u7edd\u5bf9\u5e38\u7528\u6a21\u5f0f\uff0c\u51e0\u4e4e\u6ca1\u4ec0\u4e48\u4eba\u4f1a\u613f\u610f\u591a\u6253[]\u7684\uff0c\u4f46\u662f[]\u7684\u5b58\u5728\u4ef7\u503c\u662f\u6709\u7684\uff0c\u6bd4\u5982obj.x<\/code>\u5176\u4e2dx\u5982\u679c\u662f\u5408\u6cd5\u5b57\u7b26\u4e32\u8fd8\u597d\uff0c\u5982\u679cx\u662fabc-xyz\u8fd9\u79cd\u7c7b\u578b\uff0c\u5219\u4f7f\u7528.<\/code>\u5c31\u4f1a\u975e\u6cd5\uff0c\u800c\u6b64\u65f6\u4f7f\u7528obj['abc-xyz']<\/code>\u5373\u53ef\uff0c\u6ce8\u610f\u91cc\u9762\u662f\u5b57\u7b26\u4e32\u3002<\/p><\/blockquote>\n
Object\u6ca1\u6709\u4ec0\u4e48\u7279\u6b8a\u7684\u5e38\u7528\u65b9\u6cd5\uff08\u6216\u5c5e\u6027\uff09\uff0c\u56e0\u4e3a\u4f60\u8981\u4ec0\u4e48\uff0c\u81ea\u5df1\u8865\u5145\u4ec0\u4e48\uff0c\u5982\u4e0b\uff1a<\/p>\n
var<\/span> obj <\/span>=<\/span> {<\/span>\r\n    num1<\/span>:<\/span> 1<\/span>,<\/span>\r\n    func1<\/span>:<\/span> function<\/span>()<\/span> {<\/span>\r\n        return<\/span> '\u6211\u662f\u51fd\u6570'<\/span>\r\n    },<\/span>\r\n}<\/span>\r\n\r\nobj<\/span>.<\/span>num1 <\/span>\/\/ 1<\/span>\r\nobj<\/span>.<\/span>func1<\/span>()<\/span> \/\/ \u201c\u6211\u662f\u51fd\u6570\u201d<\/span><\/code><\/pre>\n
\u770b\u770b\u4e0b\u9762\u8fd9\u4e2a\uff0c\u6709\u6ca1\u6709\u4ec0\u4e48\u611f\u89c9\uff1f<\/p>\n
var<\/span> array<\/span>=<\/span> {<\/span>\r\n    length<\/span>:<\/span> 1<\/span>,<\/span>\r\n    indexOf<\/span>:<\/span> function<\/span>(<\/span>item<\/span>)<\/span> {<\/span>\r\n        return<\/span> 2<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\narray<\/span>.<\/span>length <\/span>\/\/ 1<\/span>\r\narray<\/span>.<\/span>indexOf<\/span>(<\/span>'x'<\/span>)<\/span> \/\/ 2<\/span><\/code><\/pre>\n
\u662f\u4e0d\u662f\u5f88\u50cf\u6570\u7ec4\u7684\u64cd\u4f5c\uff1f<\/p>\n
\u4e0d\u8981\u8bef\u89e3\u6570\u7ec4\u662f\u4e0a\u9762\u8fd9\u4e2a\u5bf9\u8c61\u554a\uff0c\u6211\u53ea\u662f\u60f3\u8bf4\uff0c\u4f60\u8981\u5565\uff0c\u81ea\u5df1\u8865\u5145\u5565\uff0c\u81ea\u5df1\u521b\u5efa\u4e00\u4e2a\u6570\u7ec4\u7ed3\u6784\u90fd\u53ef\u4ee5\u3002<\/p>\n
\u5bf9\u8c61\u7684\u952e\u503c\u5bf9\u91cc\u9762\u7684\u503c\uff0c\u5c31\u662fkey-value\u7684value\u4e5f\u53ef\u4ee5\u662fObject\uff0c\u6240\u4ee5Object\u53ef\u4ee5\u975e\u5e38\u975e\u5e38\u590d\u6742\uff08\u6570\u7ec4\u4e5f\u662f\uff09\u3002<\/p>\n
\u6570\u7ec4\u4e0e\u5bf9\u8c61\u662f\u53ef\u4ee5\u4e92\u76f8\u5957\u7528\u7684\uff0c\u867d\u7136\u7406\u8bba\u4e0a\u53ef\u4ee5\u65e0\u9650\u5957\u7528\u4e0b\u53bb\uff0c\u4f46\u8bf7\u5728\u5b9e\u9645\u4f7f\u7528\u4e2d\u907f\u514d\u8fc7\u591a\u6df7\u5408\u5957\u7528\u3002<\/p><\/blockquote>\n
delete<\/strong><\/p>\n
\u4e00\u4e2a\u6bd4\u8f83\u91cd\u8981\u7684\u64cd\u4f5c\u7b26\uff0c\u6216\u8005\u8bf4\u662f\u5e38\u7528\u5904\u7406Object\u7684\u4e00\u4e2a\u65b9\u5f0f\uff1a<\/p>\n
delete obj.x<\/code>\u00a0\u5220\u9664\u5bf9\u8c61obj\u7684x\u952e\u503c\u5bf9\uff0c\u8fd4\u56de\u503c\u662f\u4e2a\u5e03\u5c14\u503c\uff0c\u8bf4\u660e\u6709\u6ca1\u6709\u5220\u9664\u6210\u529f\u3002<\/p>\n
delete\u5199\u6cd5\u6709\u4e24\u79cd\uff0cdelete obj.x<\/code>\u548cdelete(obj.x)<\/code>\uff0c\u8fd9\u91cc\u8981\u6ce8\u610f\uff0c\u5f62\u5982delete\u6216typeof\u8fd9\u79cd\uff0c\u4e0d\u662f\u51fd\u6570\uff0c\u4ed6\u4eec\u662f\u8ddf\uff08++\u81ea\u589e\u3001–\u81ea\u51cf\uff09\u4e00\u6837\u7684\u4e00\u5143\u64cd\u4f5c\u7b26\uff0c\u4f7f\u7528\u62ec\u53f7\u4e0d\u662f\u51fd\u6570\u8c03\u7528\u7684\u610f\u601d\u3002<\/p>\n
\u4e25\u683c\u6765\u8bf4delete\u53ef\u4ee5\u64cd\u4f5c\u6240\u6709\u5f15\u7528\uff0c\u56e0\u6b64\u53ef\u4ee5\u64cd\u4f5cObject\u5c5e\u6027\u7684\u5f15\u7528\u3002<\/p><\/blockquote>\n
delete\u793a\u4f8b\uff1a<\/p>\n
var<\/span> arr <\/span>=<\/span> [<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>]<\/span>\r\nvar<\/span> obj <\/span>=<\/span> {<\/span>\r\n    a<\/span>:<\/span> 1<\/span>,<\/span>\r\n    b<\/span>:<\/span> 2<\/span>\r\n}<\/span>\r\n\r\ndelete<\/span> arr<\/span>[<\/span>1<\/span>]<\/span> \/\/ true<\/span>\r\narr <\/span>\/\/ [1, empty, 3]\uff0c\u4f1a\u5220\u9664\u7d22\u5f15\u4e3a1\u5143\u7d20\u7684\u5185\u5bb9\uff0c\u4f46\u662f\u4e0d\u5220\u9664\u4f4d\u7f6e<\/span>\r\ndelete<\/span> obj<\/span>.<\/span>a <\/span>\/\/ true<\/span>\r\nobj <\/span>\/\/ {b: 2}\uff0ca\u7684\u952e\u503c\u5bf9\u62ff\u8d70\u4e86\uff0c\u5e72\u5e72\u51c0\u51c0<\/span>\r\n\r\ndelete<\/span> arr <\/span>\/\/ true<\/span>\r\narr <\/span>\/\/ arr is not defined<\/span>\r\n\r\ndelete<\/span> obj\r\nobj <\/span>\/\/ obj is not defined<\/span>\r\n\r\ndelete<\/span> arr <\/span>\/\/ true\uff0c\u6b64\u65f6\u7684arr\u5df2\u7ecf\u6ca1\u6709\u4e86\uff0c\u76f8\u5f53\u4e8edelete\u4e2a\u7a7a\uff0c\u5141\u8bb8\u3002<\/span>\r\ndelete<\/span> obj <\/span>\/\/ \u4e00\u6837<\/span><\/code><\/pre>\n
\u7531\u4e0a\u65b9\u793a\u4f8b\u53ef\u4ee5\u770b\u51fa\uff0cdelete\u5728\u6570\u7ec4\u4e0a\u4f7f\u7528\u65f6\u6bd4\u8f83\u5751\u7684\uff0c\u6240\u4ee5\u5e38\u89c1\u4e00\u70b9\u8fd8\u662f\u5728Object\u4e0a\u9762\u4f7f\u7528\u3002<\/p>\n
\u522b\u95ee{} + 1<\/code>\u662f\u591a\u5c11\uff0c\u9996\u5148\u786e\u5b9e\u662f\u5f53\u505a0\u5904\u7406\uff0c\u4f46\u662f\u5b9e\u9645\u4e2d\u5b8c\u5168\u6ca1\u6709\u610f\u4e49\uff0c\u56e0\u4e3a\u6570\u7ec4\u91cc\u9762\u5047\u5982\u662f\u7eaf\u5b57\u7b26\u6570\u7ec4\u6216\u7eaf\u6570\u5b57\u6570\u7ec4\uff0c\u4f7f\u7528\u52a0\u51cf\u53ef\u4ee5\u8003\u8651\u7701\u4e8b\uff0c\u4f46\u662f\u5bf9\u8c61\u52a0\u51cf\uff0c\u5f53\u5355\u7eaf\u662f{}\u65f6\u5019\u4ee3\u8868\u7684\u4e0d\u662fObject\uff0c\u662f\u4ee3\u7801\u5757\uff01\u5f53\u4f60\u4f7f\u7528new Object()\u586b\u5145\u6570\u636e\u65f6\u5019\uff0c\u52a0\u51cf\u7b2c\u4e00\u6ca1\u6709\u610f\u4e49\uff0c\u7b2c\u4e8c\u4efb\u4f55\u60c5\u51b5\u7ed3\u679c\u90fd\u662f\uff08\u62ff+1\u505a\u793a\u4f8b\uff09\"[object Object]1\"<\/code>\uff1b{a: 1, b: 2} + 1<\/code>\u662f\u4f1a\u62a5\u9519\uff0c\u8bed\u6cd5\u4e0d\u6b63\u786e\u3002
\n\u4f5c\u8005\uff1a\u524d\u7aef\u7ec5\u58eb
\n\u94fe\u63a5\uff1ahttps:\/\/www.imooc.com\/article\/49594<\/p>\n","protected":false},"excerpt":{"rendered":"
Object \u6211\u4eec\u5e38\u8bf4\u7684\u5bf9\u8c61\uff0c\u5b57\u5178\uff0c\u952e\u503c\u5bf9\u3002\u6570\u636e\u50a8\u5b58\u4e0b\u6765\u662f\u6ca1\u6709\u524d\u540e\u987a\u5e8f\u7684\uff0c\u6216\u8bb8\u4f60\u4f1a\u5728\u76f8\u540c\u7684\u8fd0\u884c\u73af\u5883\u4e0b\uff0c\u6bcf\u6b21\u6253\u5370 […]<\/p>\n","protected":false},"author":1,"featured_media":180,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[10],"tags":[19],"_links":{"self":[{"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/posts\/632"}],"collection":[{"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=632"}],"version-history":[{"count":1,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/posts\/632\/revisions"}],"predecessor-version":[{"id":633,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/posts\/632\/revisions\/633"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=\/wp\/v2\/media\/180"}],"wp:attachment":[{"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=632"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=632"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.xrhoujie.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=632"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}