{"id":908,"date":"2017-03-12T12:30:27","date_gmt":"2017-03-12T04:30:27","guid":{"rendered":"http:\/\/www.qdabc.cn\/?p=908"},"modified":"2017-03-12T11:58:54","modified_gmt":"2017-03-12T03:58:54","slug":"javascript%e5%b8%b8%e7%94%a8%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%96%b9%e6%b3%95%e5%92%8c%e5%b1%9e%e6%80%a7","status":"publish","type":"post","link":"http:\/\/www.qdabc.cn\/?p=908","title":{"rendered":"JavaScript\u5e38\u7528\u5b57\u7b26\u4e32\u65b9\u6cd5\u548c\u5c5e\u6027"},"content":{"rendered":"<p>var str = \u2018abcd\u2019<\/p>\n<p>str.<strong>charAt<\/strong>(0); \/\/\u8f93\u51fa\u4e0b\u6807\u4f4d\u7f6e\u7684\u5b57\u7b26<\/p>\n<p>str.<strong>charCodeAt<\/strong>(0);\/\/\u8f93\u51fa\u4e0b\u6807\u4f4d\u7f6e\u7684\u5b57\u7b26\u7f16\u7801\u503c<\/p>\n<p>str.<strong>concat<\/strong>(\u2018e\u2019); \/\/\u8f93\u51fa\u62fc\u63a5\u540e\u7684\u5b57\u7b26\u4e32<\/p>\n<p>str.<strong>indexOf<\/strong>(\u2018c\u2019); \/\/\u8f93\u51fa\u6307\u5b9a\u5b57\u7b26\u7684\u4e0b\u6807\u4f4d\u7f6e<\/p>\n<p>str.<strong>lastIndexOf<\/strong>(\u2018c\u2019); \/\/\u4ece\u540e\u5411\u524d\u641c\u7d22\u8f93\u51fa\u6307\u5b9a\u5b57\u7b26\u7684\u4e0b\u6807\u4f4d\u7f6e<\/p>\n<p>str.<strong>length<\/strong>; \/\/\u8f93\u51fa\u5b57\u7b26\u4e32\u957f\u5ea6<\/p>\n<p>str.<strong>localeCompare<\/strong>(\u2018efg\u2019); \/\/\u6309\u7167\u5b57\u6bcd\u8868\u987a\u5e8f\u89c4\u5219\u6bd4\u8f83\uff0c\u8f93\u51fa\u6bd4\u8f83\u7ed3\u679c\uff0c\u9760\u524d\u8f93\u51fa1\uff0c\u9760\u540e\u8f93\u51fa-1\uff0c\u76f8\u7b49\u8f93\u51fa0<\/p>\n<p>str.<strong>search<\/strong>(\u2018a\u2019); \/\/\u8f93\u51fa\u6307\u5b9a\u5b57\u7b26\u7684\u4e0b\u6807\u4f4d\u7f6e<\/p>\n<p>str.<strong>slice<\/strong>(1,5); \/\/\u8f93\u51fa\u6307\u5b9a\u5f00\u59cb\u4e0b\u6807\u5230\u7ed3\u675f\u4e0b\u6807\u7684\u5b57\u7b26\uff0c\u4f46\u4e0d\u5305\u62ec\u7ed3\u675f\u4f4d\u7f6e\u7684\u5b57\u7b26<\/p>\n<p>str.<strong>split<\/strong>(\u2018c\u2019); \/\/\u8f93\u51fa\u5b57\u7b26\u4e32\u4ee5\u6307\u5b9a\u5b57\u7b26\u5206\u5272\u4e3a\u6570\u7ec4<\/p>\n<p>str.<strong>substr<\/strong>(0,2); \/\/\u8f93\u51fa\u6307\u5b9a\u4e0b\u6807\u540e\u9762\u6307\u957f\u5ea6\u7684\u5b57\u7b26<\/p>\n<p>str.<strong>substring<\/strong>(0); \/\/\u5982\u679c\u6ca1\u6709\u6307\u5b9a\u7ed3\u675f\u4f4d\u7f6e\u4e0b\u6807\uff0c\u5c06\u8f93\u51fa\u6307\u5b9a\u5f00\u59cb\u4e0b\u6807\u5230\u6700\u540e\u4e0b\u6807\u7684\u5b57\u7b26<\/p>\n<p>str.<strong>substring<\/strong>(0,3); \/\/\u8f93\u51fa\u6307\u5b9a\u5f00\u59cb\u4e0b\u6807\u5230\u7ed3\u675f\u4e0b\u6807\u7684\u5b57\u7b26\uff0c\u4f46\u4e0d\u5305\u62ec\u7ed3\u675f\u4f4d\u7f6e\u7684\u5b57\u7b26<\/p>\n<p>str.<strong>toLowerCase<\/strong>(); \/\/\u8f93\u51fa\u8f6c\u6362\u4e3a\u5c0f\u5199\u5b57\u6bcd\u7684\u5b57\u7b26<\/p>\n<p>str.<strong>toString<\/strong>(); \/\/\u628a\u5176\u4ed6\u7c7b\u578b\u7684\u6570\u636e\u8f93\u51fa\u4e3a\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u6570\u636e<\/p>\n<p>str.<strong>toUpperCase<\/strong>(); \/\/\u8f93\u51fa\u8f6c\u6362\u4e3a\u5927\u5199\u5b57\u6bcd\u7684\u5b57\u7b26<\/p>\n<p class=\"post-copyright\">\u6b22\u8fce\u5206\u4eab\u672c\u6587\uff0c\u8f6c\u8f7d\u8bf7\u4fdd\u7559\u51fa\u5904\uff1a<a href=\"http:\/\/www.qdabc.cn\">\u524d\u7aefABC<\/a> &raquo; <a href=\"http:\/\/www.qdabc.cn\/?p=908\">JavaScript\u5e38\u7528\u5b57\u7b26\u4e32\u65b9\u6cd5\u548c\u5c5e\u6027<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>var str = \u2018abcd\u2019 str.charAt(0); \/\/\u8f93\u51fa\u4e0b\u6807\u4f4d\u7f6e\u7684\u5b57\u7b26 str.charCodeAt(0);\/\/\u8f93\u51fa\u4e0b\u6807\u4f4d\u7f6e\u7684\u5b57\u7b26\u7f16\u7801\u503c str.concat(\u2018e\u2019); \/\/\u8f93\u51fa\u62fc\u63a5 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":78,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[9,91],"_links":{"self":[{"href":"http:\/\/www.qdabc.cn\/index.php?rest_route=\/wp\/v2\/posts\/908"}],"collection":[{"href":"http:\/\/www.qdabc.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.qdabc.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.qdabc.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.qdabc.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=908"}],"version-history":[{"count":1,"href":"http:\/\/www.qdabc.cn\/index.php?rest_route=\/wp\/v2\/posts\/908\/revisions"}],"predecessor-version":[{"id":909,"href":"http:\/\/www.qdabc.cn\/index.php?rest_route=\/wp\/v2\/posts\/908\/revisions\/909"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.qdabc.cn\/index.php?rest_route=\/wp\/v2\/media\/78"}],"wp:attachment":[{"href":"http:\/\/www.qdabc.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=908"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.qdabc.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=908"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.qdabc.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=908"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}