{"id":2191,"date":"2017-04-14T10:01:00","date_gmt":"2017-04-14T02:01:00","guid":{"rendered":"http:\/\/www.imzouyang.com\/blog\/?p=2191"},"modified":"2020-10-28T22:46:57","modified_gmt":"2020-10-28T14:46:57","slug":"js%e6%8a%80%e5%b7%a7%ef%bc%9a%e4%bd%8d%e8%bf%90%e7%ae%97%e7%ac%a6%e6%8f%90%e5%8d%87%e4%bb%a3%e7%a0%81%e6%80%a7%e8%83%bd","status":"publish","type":"post","link":"http:\/\/www.imzouyang.com\/blog\/archives\/2191.html","title":{"rendered":"js\u6280\u5de7\uff1a\u4f4d\u8fd0\u7b97\u7b26\u63d0\u5347\u4ee3\u7801\u6027\u80fd"},"content":{"rendered":"\n<p>\u4f4d\u64cd\u4f5c \u5177\u6709\u6027\u80fd\u4f18\u52bf\u3002\u5982\u679c\u53ef\u4ee5\uff0c\u4f18\u5148\u8003\u8651\u4f4d\u8fd0\u7b97\u7b26\u3002\u5e38\u89c1\u4f7f\u7528\u59ff\u52bf\uff1a<\/p>\n\n\n\n<p>1\u3001\u6309\u4f4d\u4e0e<\/p>\n\n\n\n<p>\u5bf92\u53d6\u6a21\uff1a\uff08\u5e94\u7528\u573a\u666f\uff0c\u6bd4\u5982 \u5947\u5076\u6570\u884c\u5217\u7684 \u5224\u65ad\u64cd\u4f5c\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u4e00\u822c\u64cd\u4f5c\nif( i % 2 ){\n  \/\/\u5076\u6570\u64cd\u4f5c\n} else {\n  \/\/\u5947\u6570\u64cd\u4f5c\n}\n\n\/\/\u4f4d\u8fd0\u7b97\u7b26\u64cd\u4f5c \u6539\u5199\uff0c\u901f\u5ea6\u63d0\u534750%\uff08\u53d6\u51b3\u4e8e\u6d4f\u89c8\u5668\uff09\uff1a\nif( i &amp; 1 ){\n  \/\/\u5947\u6570\u64cd\u4f5c\n} else {\n  \/\/\u5076\u6570\u64cd\u4f5c\n}\n\n\/\/\u6d4b\u8bd5\uff1a\nvar c = (18&amp;1); \/\/0\nvar c = (31&amp;1); \/\/1\nvar c = (0&amp;1); \/\/0<\/code><\/pre>\n\n\n\n<p>\u539f\u7406\uff1a32\u4f4d\u7684\u6570\u5b57\u7684\u4e8c\u8fdb\u5236\u5e95\u5c42\u8868\u793a\uff0c\u5076\u6570\u6700\u4f4e\u4f4d\u662f 0 \uff0c\u5947\u6570\u6700\u4f4e\u4f4d \u662f1\u3002\u82e5\u4e0e\u6570\u5b57 1 \u8fdb\u884c \u6309\u4f4d\u4e0e \u8fd0\u7b97\u5224\u65ad\u65f6\uff0c\u5076\u6570\u4e3a 0\uff0c\u5947\u6570\u4e3a 1\u3002\u5219\u53ef\u5224\u65ad\u51fa\u5947\u5076\u6570\u3002<\/p>\n\n\n\n<p>2\u3001\u4f4d\u63a9\u7801 \u914d\u5408  \u6309\u4f4d\u6216<\/p>\n\n\n\n<p>\u5bf9\u8bb8\u591a\u6570\u5b57\u9009\u9879\u503c\u9891\u7e41\u68c0\u7d22\u68c0\u67e5\u7684\u60c5\u5f62\uff0c\u4f1a\u63d0\u9ad8\u6574\u4f53\u6027\u80fd\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u6309\u4f4d\u6216 \u521b\u5efa\u4e00\u4e2a \u6570\u5b57\u9009\u9879\u503c\nvar options = 1 | 2 | 4;\n\/\/\u5224\u65ad \u67d0\u4e2a \u6570\u5b57 \u662f\u5426\u5728\u8be5\u9009\u9879\u5185\nif( options &amp; 4 ){\n  console.log(\"\u5728\u91cc\u9762\");  \/\/\u4f1a\u6253\u5370\u5230\u8fd9\u53e5\u8bdd\n}\n\n\/\/\u53ea\u80fd\u7528\u4e8e\u6570\u5b57\uff0c\u5b57\u7b26\u4e32\u4e0d\u884c\u7684\uff1a\nvar options = \"\u6211\" | \"\u4f60\" | \"\u4ed6\";\nif( options &amp; \"\u4f60\" ){  \/\/\u9009\u9879\u662f\u5b57\u7b26\u4e32\uff0c\u65e0\u6cd5\u5224\u65ad\u4e3a true \u7684\n  console.log(\"\u5728\u91cc\u9762\");  \/\/\u4e0d\u4f1a\u6253\u5370\u5230\u8fd9\u53e5\u8bdd\n}<\/code><\/pre>\n\n\n\n<p>\u539f\u7406\uff1a\u4f4d\u63a9\u7801\u7528\u4e8e\u5904\u7406\u540c\u65f6\u5b58\u5728\u591a\u4e2a\u5e03\u5c14\u503c\u9009\u9879\u7684\u60c5\u5f62\uff1b\u5355\u4e2a\u6570\u5b57\u7684\u6bcf\u4e00\u4f4d\u6765\u5224\u5b9a\u662f\u5426\u9009\u9879\u6210\u7acb\uff0c\u4ece\u800c\u6709\u6548\u7684\u628a\u6570\u5b57\u8f6c\u6362\u4e3a\u7531\u5e03\u5c14\u503c\u6807\u8bb0\u7ec4\u6210\u7684\u6570\u7ec4\u3002\u63a9\u7801\u4e2d\u7684\u6bcf\u4e2a\u9009\u9879\u7684\u503c\u90fd\u7b49\u4e8e 2 \u7684\u5e42\u3002<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f4d\u64cd\u4f5c \u5177\u6709\u6027\u80fd\u4f18\u52bf\u3002\u5982\u679c\u53ef\u4ee5\uff0c\u4f18\u5148\u8003\u8651\u4f4d\u8fd0\u7b97\u7b26\u3002\u5e38\u89c1\u4f7f\u7528\u59ff\u52bf\uff1a 1\u3001\u6309\u4f4d\u4e0e \u5bf92\u53d6\u6a21\uff1a\uff08\u5e94\u7528\u573a\u666f\uff0c\u6bd4\u5982 \u5947\u5076 &hellip; <a href=\"http:\/\/www.imzouyang.com\/blog\/archives\/2191.html\" class=\"read-more\">\u7ee7\u7eed\u9605\u8bfb <span class=\"screen-reader-text sr-only\">js\u6280\u5de7\uff1a\u4f4d\u8fd0\u7b97\u7b26\u63d0\u5347\u4ee3\u7801\u6027\u80fd<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"aside","meta":[],"categories":[30],"tags":[],"_links":{"self":[{"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/posts\/2191"}],"collection":[{"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/comments?post=2191"}],"version-history":[{"count":4,"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/posts\/2191\/revisions"}],"predecessor-version":[{"id":2200,"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/posts\/2191\/revisions\/2200"}],"wp:attachment":[{"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/media?parent=2191"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/categories?post=2191"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.imzouyang.com\/blog\/wp-json\/wp\/v2\/tags?post=2191"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}