{"id":916,"date":"2022-03-10T21:30:09","date_gmt":"2022-03-10T13:30:09","guid":{"rendered":"http:\/\/www.henrycome.com\/wordpress\/?p=916"},"modified":"2022-03-10T22:03:48","modified_gmt":"2022-03-10T14:03:48","slug":"20220310212913","status":"publish","type":"post","link":"http:\/\/www.henrycome.com\/wordpress\/202203102130\/916","title":{"rendered":"P79-85-\u5b57\u7b26\u4e32.js"},"content":{"rendered":"<pre><code class=\"language-javascript\">\/*P79-\u5b57\u7b26\u4e32-\u5b9a\u4e49\u4e0e\u8f6c\u4e49\n\/\/\u7f16\u7a0b\u91cc\u9762\u6700\u5e38\u7528\u7684\u7c7b\u578b\uff0c\u7528\u6765\u663e\u793a\u6587\u672c\u4fe1\u606f\n\/\/\u4e4b\u524d\u6709\u5f88\u591a\u4f8b\u5b50\uff0c\u8fd9\u91cc\u7edf\u4e00\u770b\u4e00\u4e0b\u5b57\u7b26\u4e32\u76f8\u5173api\n\n\/\/\u65b9\u5f0f1\uff1a\u76f4\u63a5\u4f7f\u7528\u5b57\u9762\u503c\n\/\/\u5355\u5f15\u53f7\u6216\u53cc\u5f15\u53f7\u62ec\u8d77\u6765\u7684\n\/\/\u5982\u679c\u5b89\u88c5prettier\u63d2\u4ef6\u7684\u8bdd\uff0c\u5355\u5f15\u53f7\u4f1a\u88ab\u6539\u6210\u53cc\u5f15\u53f7\nvar str=&#039;hello&#039;\nconsole.log(str);\n\nvar str1=&quot;world!&quot;;\nconsole.log(str2);\n\nconsole.log(str+str1);\n\n\/\/string\u7684\u6784\u9020\u51fd\u6570\u6765\u521b\u5efastring\u5bf9\u8c61\n\/\/\u521b\u9020\u51fa\u6765\u7684\u662f\u5bf9\u8c61\u5f62\u5f0f\u7684\u5b57\u7b26\u4e32\nvar str2 = new String(&#039;\u4f60\u597d&#039;);\nconsole.log(str2);\/\/\n\/*\n\/\/\u8001\u5e08\u8bf4\u5b83\u67092\u4e2a\u5143\u7d20\uff0c\u4e00\u4e2a\u662f\u4f60\uff0c\u4e00\u4e2a\u662f\u597d\n String\u00a0{&quot;\u4f60\u597d&quot;}\n 0: &quot;\u4f60&quot;\n 1: &quot;\u597d&quot;\n length: 2\n __proto__: String\n [[PrimitiveValue]]: &quot;\u4f60\u597d&quot;\n*\/\n\/** *\/\n\n\/*\u8f6c\u4e49\u5b57\u7b26\n\/\/\u952e\u76d8\u6253\u4e0d\u51fa\u6216\u8005\u7f16\u7a0b\u4ee3\u7801\u6709\u51b2\u7a81\u7684\u5b57\u7b26\n\/\/\u4ee5\u659c\u6760\u5f00\u5934\n\n\/\/\u672c\u884c\u8bed\u53e5\u9519\u8bef\uff0cstr = &quot;\u4ed6\u8bf4\uff1a&quot;\u6211\u4eec\u51fa\u53bb\u73a9\u5427&quot;&quot;\uff1b\n\/\/\u6539\u5199\uff1a(\u5982\u679c\u5b89\u88c5prettier\u63d2\u4ef6\uff0c\u4e0b\u9762\u8fd9\u4e2a\u5199\u6cd5\u4f1a\u81ea\u52a8\u53d8\u6210\u53cc\u5d4c\u5355\u5f15\u53f7\u5d4c\u5957\u6837\u5f0f)\nstr = &quot;\u4ed6\u8bf4\uff1a\\&quot;\u6211\u4eec\u51fa\u53bb\u73a9\u5427\uff01\\&quot;&quot;;\nconsole.log(str);\/\/\u4ed6\u8bf4\uff1a&quot;\u6211\u4eec\u51fa\u53bb\u73a9\u5427\uff01&quot;\n\/\/\u6216\u8005\u5355\u53cc\u5f15\u53f7\u5d4c\u5957\nstr = &#039;\u4ed6\u8bf4\uff1a&quot;\u6211\u4eec\u51fa\u53bb\u73a9\u5427\uff01&quot;&#039;;\nconsole.log(str);\/\/\u4ed6\u8bf4\uff1a&quot;\u6211\u4eec\u51fa\u53bb\u73a9\u5427\uff01&quot;\nstr = &quot;\u4ed6\u8bf4\uff1a&#039;\u6211\u4eec\u51fa\u53bb\u73a9\u5427\uff01&#039;&quot;;\nconsole.log(str);\/\/\u4ed6\u8bf4\uff1a&#039;\u6211\u4eec\u51fa\u53bb\u73a9\u5427\uff01&#039;\n\/\/\u5176\u5b9e\uff0c\u4e2d\u6587\u7684\u8bdd\uff0c\u6211\u4eec\u4f7f\u7528\u4e2d\u6587\u5b57\u7b26\u5f15\u53f7\u662f\u4e0d\u4f1a\u548c\u82f1\u6587\u5f15\u53f7\u51b2\u7a81\u7684\nstr = &#039;\u4ed6\u8bf4\uff1a\u201c\u6211\u4eec\u51fa\u53bb\u73a9\u5427\uff01\u201d&#039;;\nconsole.log(str);\/\/\u4ed6\u8bf4\uff1a\u201c\u6211\u4eec\u51fa\u53bb\u73a9\u5427\uff01\u201d\nstr = &quot;\u4ed6\u8bf4\uff1a\u201c\u6211\u4eec\u51fa\u53bb\u73a9\u5427\uff01\u201d&quot;;\nconsole.log(str);\/\/\u4ed6\u8bf4\uff1a\u201c\u6211\u4eec\u51fa\u53bb\u73a9\u5427\uff01\u201d\n\n\/\/\u53cd\u659c\u6760\u672c\u8eab\u7684\u8bdd\uff0c\u5199\u4e24\u4e2a\u53cd\u659c\u6760\u5c31\u53ef\u4ee5\u4e86\u3002\nstr = &#039;\u4ed6\u8bf4\\\\\u6211\u4eec\u51fa\u53bb\u73a9\uff01&#039;;\nconsole.log(str);\/\/\u4ed6\u8bf4\\\u6211\u4eec\u51fa\u53bb\u73a9\uff01\n\n\/\/\u6362\u884c\u4f7f\u7528\\n\nstr = &#039;\u4ed6\u8bf4\\n\u6211\u4eec\u51fa\u53bb\u73a9\uff01&#039;;\nconsole.log(str);\n\/\/\u4ed6\u8bf4\n\/\/\u6211\u4eec\u51fa\u53bb\u73a9\uff01\n\n\/\/tab\u4f7f\u7528\\t\nstr = &#039;\u4ed6\u8bf4\\t\u201c\u6211\u4eec\u51fa\u53bb\u73a9\uff01\u201d&#039;;\nconsole.log(str);\/\/\u4ed6\u8bf4   \u201c\u6211\u4eec\u51fa\u53bb\u73a9\uff01\u201d\u3010\u524d\u9762\u7b2c\u4e00\u6b21\u7c98\u8d34\u663e\u793a1\u4e2a\u7a7a\u683c\u5bbd\u5ea6\uff0c\u540e\u9762\u7b2c\u4e8c\u6b21\u7c98\u8d34\u663e\u793a4\u4e2a\u7a7a\u683c\u5bbd\u5ea6\u3011\u4ed6\u8bf4 \u201c\u6211\u4eec\u51fa\u53bb\u73a9\uff01\u201d\n\/\/\u4ed6\u8bf4    \u201c\u6211\u4eec\u51fa\u53bb\u73a9\uff01\u201d\u3010\u52a0\u4e0a\/\/\u5c31\u6210\u4e862\u4e2a\u7a7a\u683c\u5bbd\u5ea6\uff1f\uff01\u3011\n\n\/\/\u4e5f\u53ef\u4ee5\u8f6c\u4e49unicode\u5b57\u7b26\u7684\u7279\u6b8a\u5b57\u7b26\u6216\u4e2d\u6587\nconsole.log(&#039;\\u1010&#039;);\/\/\u1010\nconsole.log(&#039;\\u4310&#039;);\/\/\u4310\n\/\/\\n\u548c\\r\u7684\u533a\u522b\uff0c\u53c2\u8003https:\/\/blog.csdn.net\/jiang7701037\/article\/details\/80754163\n\/** *\/\n\n\/*P80-\u5b57\u7b26\u4e32-\u904d\u5386\n\/\/\u4f7f\u7528for\u914d\u5408charAt()\n\/\/for-of\n\nstr = &#039;\u4ed6\u8bf4\\t\u201c\u6211\u4eec\u51fa\u53bb\u73a9\uff01\u201d&#039;;\n\nfor(let i = 0; i&lt;str.length; i++){\n    console.log(str.charAt(i));\n}\n\nfor(c of str){\n    console.log(c);\n}\n\n\/*\nindex.js:80 \u4ed6\nindex.js:80 \u8bf4\nindex.js:80     \/\/\u524d\u9762\u7684\u7a7a\u4f4d\u7f6e\u662f\\t\u7684\u4f4d\u7f6e\u3002\nindex.js:80 \u201c\nindex.js:80 \u6211\nindex.js:80 \u4eec\nindex.js:80 \u51fa\nindex.js:80 \u53bb\nindex.js:80 \u73a9\nindex.js:80 \uff01\nindex.js:80 \u201d\n\n*\/\n\/** *\/\n\n\/*P81-\u5b57\u7b26\u4e32-\u88c1\u5207\n\/\/\u548c\u6570\u7ec4\u7684slice\u4e00\u81f4\uff0c\u5939\u5b50\u4e00\u6837\u7684\u53d6\u6570\u3002\n\/\/\u53c2\u6570\u987a\u5e8f\u53ea\u80fd\u662f\u5c0f\u5927\uff0c\u4e0d\u80fd\u662f\u5927\u5c0f\n\/\/\u53ef\u4ee5\u8d1f\u6570\uff0c\n\/\/\u53ea\u6709\u4e00\u4e2a\u53c2\u6570\u8868\u793a\u5f00\u59cb\uff0c\u4ee3\u8868\u4ece\u7ed3\u675f\u5728\u5b57\u7b26\u672b\u5c3e\nvar str= &#039;This is a long string......&#039;;\nconsole.log(str.slice(0,4));\/\/This\nconsole.log(str.slice(4));\/\/ is a long string......\nconsole.log(str.slice(0,-1));\/\/This is a long string.....\nconsole.log(str.slice(-6,-1));\/\/.....\nconsole.log(str.slice(4,1));\/\/\uff08\u65e0\uff09\n\n\/\/substring\u53c2\u6570\u6ce8\u610f\uff1a\u8d1f\u6570\u548c\u5176\u4ed6\u5b57\u7b26\u4f1a\u5f53\u505a0,\u53c2\u6570\u5927\u5c0f\u987a\u5e8f\u4f1a\u8c03\u6574\u4e3a\u5c0f\u5927\u7684\u987a\u5e8f\n\/\/substring\u7c7b\u4f3c\u51fd\u6570\u4e2d\uff0c\u53ea\u63a8\u8350\u4f7f\u7528substring\nconsole.log(str.substring(0,4));\/\/This\nconsole.log(str.substring(4));\/\/ is a long string......\nconsole.log(str.substring(0,-1));\/\/(\u65e0)\nconsole.log(str.substring(-6,-1));\/\/(\u65e0)\nconsole.log(str.substring(4,1));\/\/his\n\/** *\/\n\n\/*P82-\u5b57\u7b26\u4e32\u62fc\u63a5\n\/\/\u53ef\u4ee5\u7528+\u6216concat()\u65b9\u6cd5\n\/\/MDN\u63a8\u8350\u4f7f\u7528+\uff0c\u6027\u80fd\u4f1a\u597d\u4e00\u4e9b\n\nvar str1= &#039;hello &#039;;\nvar str2= &#039;world!&#039;;\nvar str3= &#039;haha&#039;;\n\nconsole.log(str1+str2);\/\/hello world!\nconsole.log(str1.concat(str2));\/\/hello world!\nconsole.log(str1.concat(str2).concat(str3));\/\/hello world!haha\n\/** *\/\n\n\/*P83-\u5b57\u7b26\u4e32-\u5927\u5c0f\u5199\u8f6c\u5316\nconsole.log(&#039;hello&#039;.toUpperCase());\/\/HELLO\nconsole.log(&#039;WORLD&#039;.toLocaleLowerCase());\/\/world\n\n\/\/\u53d1\u73b0\u8001\u5e08\u7684\u4f8b\u5b50\uff0c\u65b9\u6cd5\u4e2d\u4e00\u4e2a\u5e26Locale\u4e00\u4e2a\u4e0d\u5e26\uff0c\u4e8e\u662f\u5bf9\u5e94\u6d4b\u8bd5\u5982\u4e0b\uff1a\nconsole.log(&#039;hello&#039;.toLocaleUpperCase());\/\/HELLO\nconsole.log(&#039;WORLD&#039;.toLowerCase());\/\/world\n\n\/*\u4ece\u4e0a\u9762\u7684\u4f8b\u5b50\u770b\u5230\uff0ctoUpperCase()\u548ctoLocaleupperCase()\u662f\u4e00\u6837\u7684\uff0c\n\u901a\u8fc7\u8d44\u6599https:\/\/blog.csdn.net\/uuihoo\/article\/details\/79695148\n\u53ef\u77e5\u662f\u4e3a\u4e86\u5904\u7406\u7279\u6b8a\u60c5\u51b5\uff0c\u6bd4\u5982\u571f\u8033\u5176\u8bed\u5bf9\u4e8eUnicode\u7684\u5927\u5c0f\u8f6c\u5316\u6709\u7279\u6b8a\u89c4\u5219\u3002\ntoLocaleUpperCase()\u548ctoLocaleLowCase()\u53ef\u4ee5\u4fdd\u8bc1\u8f6c\u6362\u6b63\u786e\u3002\n*\/\n\/** *\/\n\n\/*P84-\u53bb\u9664\u5b57\u7b26\u4e32\u9996\u4f4d\u7a7a\u683c\n\/\/\u4f7f\u7528trim()\u65b9\u6cd5\uff0c\u53ea\u80fd\u53bb\u9664\u9996\u5c3e\u7a7a\u683c\uff0c\u4e0d\u80fd\u4e2d\u95f4\u7a7a\u683c\nvar str=&#039;    hello   world   &#039;;\nconsole.log(str.trim());\/\/hello   world\/\/\u4e2d\u95f4\u7a7a\u683c\u4fdd\u7559\n\/** *\/\n\n\/*P85-\u6a21\u677f\u5b57\u7b26\u4e32*\/\n\/\/\u53ef\u4ee5\u539f\u6837\u628a\u5b57\u7b26\u4e32\u6253\u5370\u51fa\u6765\uff0c\n\/\/\u652f\u6301\u4f7f\u7528\u53d8\u91cf\u66ff\u6362\u5b57\u7b26\u4e32\u4e2d\u7684\u5360\u4f4d\u7b26\n\n\/*\u7b80\u5355\u4f8b\u5b50\uff0c\u591a\u884c\u53d8\u91cf\n\/\/VH:\u6ce8\u610f`\u548c\u5f15\u53f7\u4e00\u6837\uff0c\u9700\u8981\u6ce8\u610f\u5d4c\u5957\u548c\u8f6c\u4e49\u95ee\u9898\n\/\/VH\uff1a\u5b57\u7b26\u4e32\u5185\u8868\u73b0`\u7684\u8bdd\uff0c\u9700\u8981\u5d4c\u5957\uff0c\u4e0d\u7528\u5d4c\u5957\u9700\u8981\u8f6c\u4e49\nvar longStr= `\nTemplate literals are enclosed by the backtick\n \\`\\` (grave accent) character\n  instead of double or single quotes.`;\nconsole.log(longStr);\n\/*\u4e0b\u9762\u7b2c\u4e00\u884c\u7a7a\u884c\uff0c\u56e0\u4e3a\u53d8\u91cf\u8d4b\u503c\u7684\u65f6\u5019\uff0c\u5b57\u7b26\u4e32\u4e5f\u662f\u7a7a\u4e86\u4e00\u884c\n\nTemplate literals are enclosed by the backtick\n `` (grave accent) character\n  instead of double or single quotes.\n*\/\n\/** *\/\n\n\/*\u6a21\u677f\u5b57\u7b26\u4e32\u7684\u4f8b\u5b50\nvar name =&#039;\u5cf0\u534e&#039;;\nvar str=`\u4f60\u597d\uff0c${name}`;\nconsole.log(str);\/\/\u4f60\u597d\uff0c\u5cf0\u534e\n\n\/\/\u5982\u679c\u6ca1\u63d0\u524d\u5b9a\u4e49\u53d8\u91cf\u4f1a\u62a5\u9519\nvar str=`\u4f60\u597d\uff0c${myName}`;\/\/Uncaught ReferenceError: myName is not defined\n\/** *\/\n\n\/*\u9ad8\u7ea7\u7528\u6cd5*\/\n\/*\u8001\u5e08\u7684\u4f8b\u5b50\n\/\/\u4f5c\u4e3a\u51fd\u6570\u7684\u53c2\u6570\u4f7f\u7528`${}`\n\/\/`${}`\u63d0\u4f9b\u53c2\u6570\u4e3a\uff1a\u7b2c\u4e00\u4e2a\u662f${}\u524d\u540e\u5b57\u7b26\u4e3a2\u4e2a\u5143\u7d20\u7684\u6570\u7ec4\uff0c\n\/\/\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f${}\u672c\u8eab\u7684\u503c\nfunction greeting(strings,gender){\n    console.log(strings);\n    console.log(gender);\n    return strings[0]+gender+strings[1];\n}\nvar gender=&#039;M&#039;;\nvar result=greeting`\u4f60\u597d\uff0c\u5cf0\u534e${gender},\u65e9\u4e0a\u597d\uff01`;\nconsole.log(result);\n\/*\n(2)\u00a0[&quot;\u4f60\u597d\uff0c\u5cf0\u534e&quot;, &quot;,\u65e9\u4e0a\u597d\uff01&quot;, raw: Array(2)]\nM\n\u4f60\u597d\uff0c\u5cf0\u534eM,\u65e9\u4e0a\u597d\uff01\n*\/\n\/** *\/\n\n\/*\u6d4b\u8bd5\u591a\u4e2a${}\u7684\u60c5\u51b5\n\/\/\u7ecf\u8fc7\u4e0b\u9762\u6d4b\u8bd5\uff0c\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f${}\u5206\u5272\u70b9\u5b57\u7b26\u4e32\u4f5c\u4e3a\u5143\u7d20\u7684\u6570\u7ec4\n\/\/\u7b2c\u4e8c\u4e2a\u53c2\u6570\u5f00\u59cb\u662f${}\u7684\u503c\uff0c\u591a\u4e2a${}\u4f9d\u6b21\u540e\u6392\nfunction greeting(strings,gender,stuff){\n    console.log(strings);\n    console.log(gender);\n    console.log(stuff);\n    return strings[0]+gender+strings[1]+stuff+strings[2];\n}\nvar gender=&#039;M&#039;;\nvar stuff=&#039;Eggs&#039;;\nvar result=greeting`\u4f60\u597d\uff0c\u5cf0\u534e${gender},\u65e9\u4e0a\u597d\uff01${stuff}5\u5757\u94b1\uff01`;\nconsole.log(result);\n\/*\n(3)\u00a0[&quot;\u4f60\u597d\uff0c\u5cf0\u534e&quot;, &quot;,\u65e9\u4e0a\u597d\uff01&quot;, &quot;5\u5757\u94b1\uff01&quot;, raw: Array(3)]\nM\nEggs\n\u4f60\u597d\uff0c\u5cf0\u534eM,\u65e9\u4e0a\u597d\uff01Eggs5\u5757\u94b1\uff01\n*\/\n\/** *\/<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\/*P79-\u5b57\u7b26\u4e32-\u5b9a\u4e49\u4e0e\u8f6c\u4e49 \/\/\u7f16\u7a0b\u91cc\u9762\u6700\u5e38\u7528\u7684\u7c7b\u578b\uff0c\u7528\u6765\u663e\u793a\u6587\u672c\u4fe1\u606f \/\/\u4e4b\u524d\u6709\u5f88\u591a\u4f8b\u5b50\uff0c\u8fd9\u91cc\u7edf\u4e00\u770b\u4e00\u4e0b [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21],"tags":[],"_links":{"self":[{"href":"http:\/\/www.henrycome.com\/wordpress\/wp-json\/wp\/v2\/posts\/916"}],"collection":[{"href":"http:\/\/www.henrycome.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.henrycome.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.henrycome.com\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.henrycome.com\/wordpress\/wp-json\/wp\/v2\/comments?post=916"}],"version-history":[{"count":1,"href":"http:\/\/www.henrycome.com\/wordpress\/wp-json\/wp\/v2\/posts\/916\/revisions"}],"predecessor-version":[{"id":917,"href":"http:\/\/www.henrycome.com\/wordpress\/wp-json\/wp\/v2\/posts\/916\/revisions\/917"}],"wp:attachment":[{"href":"http:\/\/www.henrycome.com\/wordpress\/wp-json\/wp\/v2\/media?parent=916"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.henrycome.com\/wordpress\/wp-json\/wp\/v2\/categories?post=916"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.henrycome.com\/wordpress\/wp-json\/wp\/v2\/tags?post=916"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}