{"id":4429,"date":"2019-07-17T17:21:19","date_gmt":"2019-07-17T09:21:19","guid":{"rendered":"https:\/\/www.xttblog.com\/?p=4429"},"modified":"2019-07-17T17:21:19","modified_gmt":"2019-07-17T09:21:19","slug":"lua-%e7%9a%84%e6%a0%87%e8%af%86%e7%ac%a6%e3%80%81%e5%85%b3%e9%94%ae%e5%ad%97%e3%80%81%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%e5%92%8c%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%8b%bc%e6%8e%a5","status":"publish","type":"post","link":"https:\/\/www.xttblog.com\/?p=4429","title":{"rendered":"Lua \u7684\u6807\u8bc6\u7b26\u3001\u5173\u952e\u5b57\u3001\u6570\u636e\u7c7b\u578b\u548c\u5b57\u7b26\u4e32\u62fc\u63a5"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Lua \u4e0d\u540c\u7684\u4eba\uff0c\u8bfb\u7684\u82f1\u6587\u4e0d\u540c\u3002\u6709\u7684\u76f4\u63a5\u8bfb L\u3001U\u3001A\uff0c\u6709\u7684\u8bfb [\u02c8lu\u0259]\uff0c\u5362\u963f\u3002\u5982\u679c\u6709\u4eba\u8bfb\u7684\u548c\u4f60\u4e0d\u4e00\u6837\uff0c\u4e5f\u4e0d\u8981\u5632\u7b11\u4ed6\uff0c\u56e0\u4e3a\u4ed6\u8bf4\u4e0d\u5b9a\u5c31\u662f\u4e00\u4e2a\u9690\u85cf\u7684\u5927\u4f6c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lua \u5b66\u8d77\u6765\u975e\u5e38\u7684\u7b80\u5355\uff0c\u524d\u63d0\u662f\u4f60\u6709\u4e00\u95e8\u7f16\u7a0b\u8bed\u8a00\u57fa\u7840\u3002\u4eca\u5929\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b Lua \u7684\u6807\u8bc6\u7b26\u3001\u5173\u952e\u5b57\u3001\u5b57\u7b26\u4e32\u8fde\u63a5\u7b49\u77e5\u8bc6\u70b9\u5427\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lua \u7684\u6807\u8bc6\u7b26\u4e00\u822c\u7528\u6765\u5b9a\u4e49\u53d8\u91cf\u3001\u51fd\u6570\u540d\u7b49\u3002\u6240\u4ee5\uff0c\u5b83\u5fc5\u987b\u8981\u6709\u4e00\u5957\u81ea\u5df1\u7684\u89c4\u8303\u3002Lua \u6807\u793a\u7b26\u4ee5\u4e00\u4e2a\u5b57\u6bcd A \u5230 Z \u6216 a \u5230 z \u6216\u4e0b\u5212\u7ebf _ \u5f00\u5934\u540e\u52a0\u4e0a 0 \u4e2a\u6216\u591a\u4e2a\u5b57\u6bcd\uff0c\u4e0b\u5212\u7ebf\uff0c\u6570\u5b57\uff080 \u5230 9\uff09\u3002\u770b\u8d77\u6765\u548c Java \u4e00\u6837\uff0c\u4f46\u5b9e\u9645\u4e0a Java \u7684\u53d8\u91cf\u4e2d\u8fd8\u652f\u6301 $ \u7b26\u53f7\u3002\u4f46 Lua \u4e2d\u5c31\u4e0d\u884c\uff0cLua \u4e0d\u5141\u8bb8\u4f7f\u7528\u7279\u6b8a\u5b57\u7b26\u5982 @, $, \u548c % \u6765\u5b9a\u4e49\u6807\u793a\u7b26\u3002\u53e6\u5916\u4e5f\u4e0d\u5efa\u8bae\u5927\u5bb6\u4f7f\u7528\u4e0b\u5212\u7ebf\u52a0\u5927\u5199\u5b57\u6bcd\u7684\u6807\u793a\u7b26\uff0c\u56e0\u4e3a Lua \u7684\u4fdd\u7559\u5b57\u4e5f\u662f\u8fd9\u6837\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lua \u662f\u4e00\u4e2a\u533a\u5206\u5927\u5c0f\u5199\u7684\u7f16\u7a0b\u8bed\u8a00\u3002\u56e0\u6b64\u5728 Lua \u4e2d Xttblog \u4e0e xttblog \u662f\u4e24\u4e2a\u4e0d\u540c\u7684\u6807\u793a\u7b26\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u5982\uff0c\u8fd9\u51e0\u4e2a\u53d8\u91cf\uff1axttblog\u3001x0\u3001x_\u3001Xttblog\u3001x_ttblog\u3001_x\u3001xttBlog \u90fd\u662f\u6b63\u786e\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u548c\u5176\u4ed6\u8bed\u8a00\u7c7b\u4f3c\uff0cLua \u4e2d\u4fdd\u7559\u7684\u5173\u952e\u5b57\u4e5f\u4e0d\u80fd\u7528\u505a\u6807\u8bc6\u7b26\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lua \u4e2d\u7684\u4fdd\u7559\u5173\u952e\u5b57\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>| and      | break | do    | else   |\n| elseif   | end   | false | for    |\n| function | if    | in    | local  |\n| nil      | not   | or    | repeat |\n| return   | then  | true  | until  |\n| while    |<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u5728\u4e0a\u4e00\u7bc7\u6587\u7ae0\u4e2d\u8fd8\u8bb2\u5230\u4e86 Lua \u4e2d\u7684\u53d8\u91cf\u3002\u6709\u5168\u5c40\u53d8\u91cf\u548c\u5c40\u90e8\u53d8\u91cf\uff0c\u5982\u679c\u5168\u662f\u5168\u5c40\u53d8\u91cf\uff0c\u90a3\u5c31\u5f88\u6d6a\u8d39\u5185\u5b58\u4e0d\u662f\u3002\u5982\u4f55\u5c06\u4e0d\u7528\u7684\u53d8\u91cf\u6e05\u7406\u6389\u5462\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b54\u6848\u662f\u7ed9\u53d8\u91cf\u8d4b\u503c\u4e3a nil\u3002\u6362\u53e5\u8bdd\u8bf4, \u5f53\u4e14\u4ec5\u5f53\u4e00\u4e2a\u53d8\u91cf\u4e0d\u7b49\u4e8e nil \u65f6\uff0c\u8fd9\u4e2a\u53d8\u91cf\u5373\u5b58\u5728\u3002\u5f53\u4e3a\u975e nil \u65f6\uff0c\u5c31\u4ee3\u8868\u8fd9\u4e2a\u53d8\u91cf\u5b58\u5728\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>xttblog = nil\nprint(xttblog)\nnil<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u4e0a\u4e00\u7bc7\u4e2d\uff0c\u6211\u8fd8\u7b80\u5355\u7684\u89e3\u91ca\u4e86\u4e00\u4e0b Lua \u7684\u6570\u5b57\u7c7b\u578b\u3002\u4eca\u5929\uff0c\u6211\u518d\u6765\u89e3\u91ca\u4e00\u4e0b\u53e6\u5916\u7684 7 \u4e2a\u6570\u636e\u7c7b\u578b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lua \u662f\u52a8\u6001\u7c7b\u578b\u8bed\u8a00\uff0c\u53d8\u91cf\u4e0d\u8981\u7c7b\u578b\u5b9a\u4e49,\u53ea\u9700\u8981\u4e3a\u53d8\u91cf\u8d4b\u503c\u3002 \u503c\u53ef\u4ee5\u5b58\u50a8\u5728\u53d8\u91cf\u4e2d\uff0c\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u6216\u7ed3\u679c\u8fd4\u56de\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lua \u4e2d\u6709 8 \u4e2a\u57fa\u672c\u7c7b\u578b\u5206\u522b\u4e3a\uff1anil\u3001boolean\u3001number\u3001string\u3001userdata\u3001function\u3001thread \u548c table\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/wx1.sinaimg.cn\/large\/8fa5dcfcgy1g52yd5uv2mj21di0kcq86.jpg\" alt=\"\" \/><figcaption>Lua \u7684\u6570\u636e\u7c7b\u578b<\/figcaption><\/figure><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>nil\uff1a\u8fd9\u4e2a\u6700\u7b80\u5355\uff0c\u53ea\u6709\u503c nil \u5c5e\u4e8e\u8be5\u7c7b\uff0c\u8868\u793a\u4e00\u4e2a\u65e0\u6548\u503c\uff08\u5728\u6761\u4ef6\u8868\u8fbe\u5f0f\u4e2d\u76f8\u5f53\u4e8e false\uff09\u3002<\/li><li>boolean\uff1a\u5305\u542b\u4e24\u4e2a\u503c\uff1afalse \u548c true\u3002<\/li><li>number\uff1a\u8868\u793a\u53cc\u7cbe\u5ea6\u7c7b\u578b\u7684\u5b9e\u6d6e\u70b9\u6570<\/li><li>string\uff1a\u5b57\u7b26\u4e32\u7531\u4e00\u5bf9\u53cc\u5f15\u53f7\u6216\u5355\u5f15\u53f7\u6765\u8868\u793a<\/li><li>function\uff1a\u7531 C \u6216 Lua \u7f16\u5199\u7684\u51fd\u6570<\/li><li>userdata\uff1a\u8868\u793a\u4efb\u610f\u5b58\u50a8\u5728\u53d8\u91cf\u4e2d\u7684 C \u6570\u636e\u7ed3\u6784<\/li><li>thread\uff1a\u8868\u793a\u6267\u884c\u7684\u72ec\u7acb\u7ebf\u8def\uff0c\u7528\u4e8e\u6267\u884c\u534f\u540c\u7a0b\u5e8f<\/li><li>table\uff1aLua \u4e2d\u7684\u8868\uff08table\uff09\u5176\u5b9e\u662f\u4e00\u4e2a&#8221;\u5173\u8054\u6570\u7ec4&#8221;\uff08associative arrays\uff09\uff0c\u6570\u7ec4\u7684\u7d22\u5f15\u53ef\u4ee5\u662f\u6570\u5b57\u6216\u8005\u662f\u5b57\u7b26\u4e32\u3002\u5728 Lua \u91cc\uff0ctable \u7684\u521b\u5efa\u662f\u901a\u8fc7&#8221;\u6784\u9020\u8868\u8fbe\u5f0f&#8221;\u6765\u5b8c\u6210\uff0c\u6700\u7b80\u5355\u6784\u9020\u8868\u8fbe\u5f0f\u662f{}\uff0c\u7528\u6765\u521b\u5efa\u4e00\u4e2a\u7a7a\u8868\u3002<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u7684\u7c7b\u578b\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 Lua \u7684 type \u51fd\u6570\u8fdb\u884c\u68c0\u6d4b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>print(type(\"Hello world\"))      --&gt; string\nprint(type(10.4*3))             --&gt; number\nprint(type(print))              --&gt; function\nprint(type(type))               --&gt; function\nprint(type(true))               --&gt; boolean\nprint(type(nil))                --&gt; nil\nprint(type(type(X)))            --&gt; string<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">table \u7c7b\u578b\u5176\u5b9e\u662f\u4e00\u4e2a&#8221;\u5173\u8054\u6570\u7ec4&#8221;\uff08associative arrays\uff09\uff0c\u6570\u7ec4\u7684\u7d22\u5f15\u53ef\u4ee5\u662f\u6570\u5b57\u6216\u8005\u662f\u5b57\u7b26\u4e32\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>-- \u521b\u5efa\u4e00\u4e2a\u7a7a\u7684 table\nlocal tbl1 = {}\n-- \u76f4\u63a5\u521d\u59cb\u8868\nlocal tbl2 = {\"x\", \"xtt\", \"blog\", \"xttblog\"}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u4ee5\u4f7f\u7528\u7d22\u5f15\uff0c\u53d6\u503c\u6216\u8005\u8d4b\u503c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>-- xttblog.lua \u811a\u672c\u6587\u4ef6\na = {}\na[\"key\"] = \"value\"\nkey = 520\na[key] = 88\na[key] = a[key] + 11\nfor k, v in pairs(a) do\n    print(k .. \" : \" .. v)\nend<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd0\u884c lua xttblog.lua \u8f93\u51fa\u5185\u5bb9\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/wx1.sinaimg.cn\/large\/8fa5dcfcgy1g52yhefp7sj20do05474l.jpg\" alt=\"\" \/><figcaption>Lua \u7684 table \u7c7b\u578b<\/figcaption><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e9b\u6570\u636e\u7c7b\u578b\uff0c\u6211\u4eec\u5728\u540e\u9762\u9047\u5230\u7684\u65f6\u5019\uff0c\u6211\u518d\u8be6\u7ec6\u7684\u8bf4\u3002\u73b0\u5728\u6211\u4eec\u6765\u770b Lua \u7684\u5b57\u7b26\u4e32\u62fc\u63a5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 Java \u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u7684\u662f + \u62fc\u63a5\u5b57\u7b26\u4e32\u3002\u4f46\u662f Lua \u4e2d\uff0c\u5b57\u7b26\u4e32\u62fc\u63a5\u7528\u7684\u662f .. \u3002\u4e3e\u4f8b\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&gt; print(\"xtt\" .. 'blog')\nxttblog\n&gt; print(1314 .. 520)\n1314520\n&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u53e6\u5916\uff0c\u8981\u8ba1\u7b97\u5b57\u7b26\u4e32\u957f\u5ea6\u8981\u7528 #\uff0c\u4e0d\u8981\u611f\u89c9\u5f88\u53e6\u7c7b\uff0c\u770b\u4e0b\u9762\u7684\u4f8b\u5b50\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&gt; len = \"www.xttblog.com\"\n&gt; print(#len)\n15\n&gt; print(#\"www.xttblog.com\")\n15\n&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0a\uff0c\u5c31\u662f\u8fd9\u4e00\u7ae0\u7684\u5185\u5bb9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u5b66\u4e60 Lua \u6709\u6240\u5e2e\u52a9\u3002<\/p>\n<!-- <audio autoplay=\"autoplay\" height=\"100\" width=\"100\" hidden=\"true\"><source src=\"https:\/\/c.coka.la\/orAvPR.mp3\" type=\"audio\/mp3\"\/><\/audio><img decoding=\"async\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/ws3.sinaimg.cn\/large\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/> --><p><!-- <img decoding=\"async\" src=\"https:\/\/raw.githubusercontent.com\/xmt1139057136\/xttblog\/master\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/>--><img decoding=\"async\" src=\"https:\/\/saas.51autoparts.cn\/api\/admin\/sys-file\/oss\/file?fileName=84db51f8561e448f9a4fda2eff0811f9.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/><\/p><p>\u6700\u540e\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u4e2a\u4eba\u5fae\u4fe1\u516c\u4f17\u53f7\uff1a\u4e1a\u4f59\u8349\uff08yyucao\uff09\uff01<b>\u53ef\u52a0\u4f5c\u8005\u5fae\u4fe1\u53f7\uff1a<font color=\"red\">xttblog2<\/font>\u3002\u5907\u6ce8\uff1a\u201c1\u201d\uff0c\u6dfb\u52a0\u535a\u4e3b\u5fae\u4fe1\u62c9\u4f60\u8fdb\u5fae\u4fe1\u7fa4\u3002\u5907\u6ce8\u9519\u8bef\u4e0d\u4f1a\u540c\u610f\u597d\u53cb\u7533\u8bf7\u3002<\/b>\u518d\u6b21\u611f\u8c22\u60a8\u7684\u5173\u6ce8\uff01\u540e\u7eed\u6709\u7cbe\u5f69\u5185\u5bb9\u4f1a\u7b2c\u4e00\u65f6\u95f4\u53d1\u7ed9\u60a8\uff01\u539f\u521b\u6587\u7ae0\u6295\u7a3f\u8bf7\u53d1\u9001\u81f3532009913@qq.com\u90ae\u7bb1\u3002\u5546\u52a1\u5408\u4f5c\u4e5f\u53ef\u6dfb\u52a0\u4f5c\u8005\u5fae\u4fe1\u8fdb\u884c\u8054\u7cfb\uff01<\/p><p>\u672c\u6587\u539f\u6587\u51fa\u5904\uff1a<a href=\"https:\/\/www.xttblog.com\">\u4e1a\u4f59\u8349<\/a>\uff1a &raquo; <a href=\"https:\/\/www.xttblog.com\/?p=4429\">Lua \u7684\u6807\u8bc6\u7b26\u3001\u5173\u952e\u5b57\u3001\u6570\u636e\u7c7b\u578b\u548c\u5b57\u7b26\u4e32\u62fc\u63a5<\/a><\/p><!-- <div class=\"bd-reward-stl\"><button id=\"bdRewardBtn\"><span><\/span><\/button><\/div> -->","protected":false},"excerpt":{"rendered":"<p>Lua \u4e0d\u540c\u7684\u4eba\uff0c\u8bfb\u7684\u82f1\u6587\u4e0d\u540c\u3002\u6709\u7684\u76f4\u63a5\u8bfb L\u3001U\u3001A\uff0c\u6709\u7684\u8bfb [\u02c8lu\u0259]\uff0c\u5362\u963f\u3002\u5982\u679c\u6709\u4eba\u8bfb\u7684\u548c\u4f60\u4e0d\u4e00\u6837\uff0c\u4e5f [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,6],"tags":[1972,1152,1603,672,127],"class_list":["post-4429","post","type-post","status-publish","format-standard","hentry","category-java","category-yyzt","tag-lua","tag-nginx","tag-openresty","tag-redis-cluster","tag-127"],"_links":{"self":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/4429","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4429"}],"version-history":[{"count":1,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/4429\/revisions"}],"predecessor-version":[{"id":4430,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/4429\/revisions\/4430"}],"wp:attachment":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4429"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4429"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4429"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}