{"id":2814,"date":"2022-06-16T11:28:31","date_gmt":"2022-06-16T03:28:31","guid":{"rendered":"https:\/\/ufqi.com\/blog\/?p=2814"},"modified":"2022-06-17T11:02:51","modified_gmt":"2022-06-17T03:02:51","slug":"ufqifina-javascript-tofixed","status":"publish","type":"post","link":"https:\/\/ufqi.com\/blog\/ufqifina-javascript-tofixed\/","title":{"rendered":"UfqiFina\u6709\u798f\u91d1\u878d\u66f4\u65b0\uff1aJavaScript\u7684\u6570\u636e\u7c7b\u578b\u5f3a\u5236\u7b49"},"content":{"rendered":"\n

UfqiFina\u6709\u798f\u91d1\u878d\u57fa\u91d1\u677f\u5757\u63d0\u4f9b\u4e86\u4e00\u79cd\u67e5\u8be2\u8bc1\u5238\u6295\u8d44\u57fa\u91d1\u7684\u6a21\u62dfK\u7ebf\u56fe\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n

\u5728\u8bc1\u5238\u6570\u636e\u7684K\u7ebf\u56fe\uff08\u8721\u70db\u56fe\uff09\u7684\u7ed8\u5236\u65f6\uff0c\u6211\u4eec\u9009\u7528\u4e86\u7b2c\u4e09\u65b9JavaScript\u7c7b\u5e93HighCharts\u4e2d\u7684HighStock\u7ec4\u4ef6\u3002\u5728\u5e94\u7528HighStock\u65f6\uff0c\u6211\u4eec\u9047\u5230\u4e00\u4e2a\u503c\u5f97\u8ba8\u8bba\u7684\u5173\u4e8eJavaScript\u6570\u636e\u7c7b\u578b\u7684\u95ee\u9898\uff0c\u8bb0\u5f55\u5982\u4e0b\u3002<\/p>\n\n\n\n

1. JavaScript\u7684\u6570\u636e\u7c7b\u578b\u5f3a\u5236\u95ee\u9898<\/strong><\/p>\n\n\n\n

\u95ee\u9898\u7684\u63cf\u8ff0\u5982\u4e0b\u3002\u6211\u4eec\u5c1d\u8bd5\u5728UfqiFina\u6709\u798f\u91d1\u878d\u7684K\u7ebf\u56fe\u4e2d\u589e\u52a0\u4e00\u4e2a\u672a\u6765\u7684\u9884\u6d4b\u503c\uff0c\u4ee5\u6b64\u6765\u5e2e\u52a9\u8c03\u7528\u8005\u5224\u65ad\u548c\u5206\u6790\u672a\u6765\u7684\u8d70\u52bf\uff0c\u6309\u5f53\u524d\u7684\u53d8\u52a8\u5e45\u5ea6\uff0c\u5982\u679c\u662f\u770b\u6da8\u4f1a\u662f\u4ec0\u4e48\u60c5\u51b5\uff0c\u5982\u679c\u662f\u770b\u8dcc\u4f1a\u662f\u4ec0\u4e48\u60c5\u51b5\u3002<\/p>\n\n\n\n

https:\/\/ufqi.com\/index.jsp?mod=financefund&act=fundChart&icode=164906&dataTimeType=weekly&predictType=1&tit=\u7406\u8d22\u670d\u52a1\u6240<\/a><\/p>\n\n\n\n

\"\"<\/a>
fig1. \u57fa\u91d1K\u7ebf\u56fe\uff1a\u4ea4\u94f6\u4e2d\u8bc1\u6d77\u5916\u4e2d\u56fd\u4e92\u8054\u7f51\u6307\u6570-164906\u4ef7\u683c\u884c\u60c5-UfqiFina-20220615UTC+08-<\/a>\u770b\u591a\u6da8<\/a><\/figcaption><\/figure>\n\n\n\n

\u4f9d\u9760\u8fc7\u5f80\u8fd1\u671f\u6570\u636e\u8ba1\u7b97\u672a\u6765\u65f6\u95f4\u8282\u70b9\u9884\u6d4b\u503c\u662f\u4e00\u4ef6\u7b80\u5355\u7684\u4e8b\u60c5\uff0c\u76f8\u5f53\u4e8e\u8ba1\u7b97\u8fc7\u5f80\u6570\u636e\u70b9\u6784\u6210\u7684\u4e00\u6761\u659c\u7ebf\u7684\u659c\u7387\u3002\u4f7f\u7528JavaScript\u6765\u505a\u8ba1\u7b97\uff0c\u9ed8\u8ba4\u662fFloat\u6570\u503c\uff0c\u9047\u6709\u5c0f\u6570\u70b9\u65f6\uff0c\u53ef\u80fd\u5e26\u6765\u975e\u5e38\u591a\u7684\u5c0f\u6570\u70b9\uff0c\u5982\u540c\u5728 MDN\u7684\u63cf\u8ff0\u4e00\u6837\uff0c
The JavaScript Number<\/code> type is a double-precision 64-bit binary format IEEE 754<\/a> value, like double<\/code> in Java or C#. <\/p>\n\n\n\n

\u6bd4\u5982\u4e00\u4e2a\u666e\u901a\u7684\u8ba1\u7b97\u53ef\u4ee5\u751f\u6210\uff0c 0.1234567890123 \u8fd9\u6837\u7684\u6570\u636e\u3002\u4e3a\u4e86\u4fbf\u4e8e\u51cf\u5c11\u5c0f\u6570\u70b9\uff0c\u6211\u4eec\u5c1d\u8bd5\u4f7f\u7528 toFixed \/ toPrecision \u51fd\u6570\u6765\u8fdb\u884c\u7ea6\u675f\uff0c\u7ecf\u8fc7\u5b9e\u8df5\uff0c\u6211\u4eec\u53d1\u73b0 toFixed \/ toPrecision \u7684\u8fd4\u56de\u503c\u4e0d\u662f Number \uff0c\u800c\u662fString.
The toFixed returns A string representing the given number using fixed-point notation.
The toPrecision()<\/code><\/strong> method returns a string representing the Number<\/code><\/a> object to the specified precision.<\/p>\n\n\n\n

\u4f8b\u5982\uff0c\u5728UfqiFina\u6709\u798f\u91d1\u878d\u7684\u67d0\u4e2a\u57fa\u91d1\u67d0\u4e00\u672a\u6765\u65f6\u70b9\u7684\u9884\u6d4b\u503c predictItem\u662f [123456, 1.0123456789] , \u7ecf\u8fc7 toFixed(4) \u4e4b\u540e\uff0cpredictItem\u6570\u636e\u53d8\u6210\u4e86 [ 123456, “1.0123”] , \u5f53\u8fd9\u4e2a\u6570\u636e\u8fdb\u4e00\u6b65\u5730\u88ab\u524d\u8f6c\u5230 HighStock \u65f6\uff0c [123456, 1.0123456789] \u53ef\u4ee5\u88ab\u6b63\u786e\u5730\u7ed8\u5236\u51fa\u6765\uff0c\u7b26\u5408\u9884\u671f\uff0c\u800c\u6570\u636e [ 123456, “1.0123”] \u5219\u88ab\u89c6\u4e3a\u975e\u6cd5\u7684\uff0c\u88ab HightStock\u4e22\u5f03\uff0c\u4e0d\u7b26\u5408\u9884\u671f\u3002<\/p>\n\n\n\n

\u76f8\u5bf9\u6298\u4e2d\u7684\u505a\u6cd5\u662f\uff0c\u5728\u91c7\u53d6\u4e86 toFixed \u622a\u65ad\u4e86\u5c0f\u6570\u4f4d\u6570\u4e4b\u540e\uff0c\u518d\u6b21\u5730\u8c03\u7528 parseFloat \u4f7f\u4e4b\u5c06 String-type \u7684\u6570\u636e\u91cd\u65b0\u53d8\u56de Number-type \u7684\u6570\u636e\u3002
The Number.parseFloat()<\/code><\/strong> method parses an argument and returns a floating point number. If a number cannot be parsed from the argument, it returns NaN<\/code><\/a>.<\/p>\n\n\n\n

predictItem[1] = parseFloat( predictItem[1].toFixed(4) );<\/p>\n\n\n\n

\u5728\u8f6f\u4ef6\u7814\u53d1\u4e2d\uff0c\u901a\u5e38\u4f7f\u7528\u5f31\u7c7b\u578b\u811a\u672c\u7f16\u7a0b\u8bed\u8a00\uff0c\u6211\u4eec\u4e0d\u8003\u8651\u6570\u636e\u7c7b\u578b\uff0c\u6bd4\u5982PHP\uff0c Perl\uff0c JavaScript\uff0c VBScript\uff0c Python\u7b49\uff0c\u6ca1\u6709\u4e25\u683c\u610f\u4e49\u4e0a\u7684\u6240\u8c13\u5b57\u7b26\u578b\u6570\u503c\u8fd8\u662f\u6570\u636e\u578b\u6570\u503c\u3002\u7ecf\u8fc7\u4e0a\u9762\u7684\u6848\u4f8b\u5206\u6790\uff0c\u6211\u4eec\u81ea\u6b64\u4e5f\u8bb8\u8981\u8ba4\u771f\u8003\u8651\uff0c\u5728JavaScript\u8fd9\u6837\u7684\u5f31\u7c7b\u578b\u811a\u672c\u7f16\u7a0b\u8bed\u8a00\u4e2d\uff0c\u5982\u679c\u542f\u7528\u7c7b\u4f3c use strict \u4e25\u8083\u6a21\u5f0f\u65f6\uff0c\u4e5f\u9700\u8981\u8ba4\u771f\u8003\u8651\u6570\u503c\u7684\u6570\u636e\u7c7b\u578b\uff08data-type\uff09\u3002 \u7a0b\u5e8f\u811a\u672c\u4efb\u52a1\u6267\u884c\u65f6\uff0c\u4ece\u6570\u503c\u7c7b\u578b\u4e0d\u654f\u611f\u53d8\u6210\u4e86\u6570\u503c\u7c7b\u578b\u654f\u611f\uff08data-type sensitive\uff09\u4e86\u3002<\/p>\n\n\n\n

\u5728 fig1. \u4e2d\uff0c\u6211\u4eec\u5c06\u9884\u6d4b\u503c\u663e\u793a\u5728K\u7ebf\u56fe\u7684\u6700\u53f3\u4fa7\uff0c\u56fe\u4e2d\uff0c\u5468\u7ebf\u56fe2022Jun15\u8c03\u7528\u65f6\uff0c\u6211\u4eec\u9884\u6d4b\u51fa\u4e86 2022Jun20\u7684\u6570\u636e\uff0c\u9884\u6d4b\u6a21\u5f0f\u4e3a\u201c\u770b\u591a\u6da8\u201d\uff08\u9ad8\u4eae\u7ea2\u8272\u8868\u793a\u9009\u4e2d\u9879\uff09\u3002 \u9884\u6d4b\u6a21\u5f0f\u9664\u4e86\u201c\u770b\u591a\u6da8\u201d\u4e4b\u5916\uff0c\u6211\u4eec\u8fd8\u63d0\u4f9b\u4e86\u201c\u770b\u7a7a\u8dcc\u201d\uff0c\u4ece\u800c\u66f4\u65b9\u4fbf\u5730\u5c55\u793a\u67d0\u4e2a\u88ab\u89c2\u6d4b\u7684\u57fa\u91d1\u6570\u636e\u5982\u679c\u6da8\uff0c\u80fd\u6da8\u5230\u591a\u9ad8\uff0c\u5982\u679c\u8dcc\u5927\u6982\u8981\u8dcc\u6210\u5565\u6837\u3002<\/p>\n\n\n\n

2. \u65e5\u671f\u53ca\u8282\u5047\u65e5\u7684\u8ba1\u7b97<\/strong><\/p>\n\n\n\n

\u8bc1\u5238\u5e02\u573a\u7684\u884c\u60c5\u662f\u9ad8\u5ea6\u65f6\u95f4\u654f\u611f\u7684\u3002\u8fd9\u79cd\u654f\u611f\u6027\u65e2\u8868\u73b0\u5728\u66f4\u65b0\u9891\u6b21\u662f\u79d2\u7ea7\uff0c\u4e5f\u8868\u73b0\u5728\u5bf9\u8fc7\u5f80\u6d77\u91cf\u6570\u636e\u7684\u5904\u7406\u3002\u5728\u65f6\u95f4\u8f74\u4e0a\uff0c\u6bd4\u5982K\u7ebf\u56fe\u63cf\u7ed8\u65f6\uff0c\u5c31\u9762\u4e34\u7740\u662f\u7528\u81ea\u7136\u65e5\u3001\u81ea\u7136\u5468\u3001\u81ea\u7136\u6708\uff0c\u8fd8\u662f\u4f7f\u7528\u4ea4\u6613\u65e5\u3001\u4ea4\u6613\u5468\u3001\u4ea4\u6613\u6708\u7684\u9009\u62e9\u3002<\/p>\n\n\n\n

\u4f7f\u7528\u81ea\u7136\u65e5\u3001\u81ea\u7136\u5468\u4f5c\u4e3a\u8ba1\u7b97\u5355\u4f4d\u662f\u76f8\u5bf9\u5bb9\u6613\u7684\uff0c\u4f46\u5374\u9762\u4e34\u5927\u91cf\u8282\u5047\u65e5\u53ca\u4e34\u65f6\u505c\u6b62\u4ea4\u6613\u7684\u65f6\u95f4\u6bb5\uff1b\u5982\u679c\u4ee5\u4ea4\u6613\u65e5\u3001\u4ea4\u6613\u5468\u4e3a\u8ba1\u7b97\u5355\u4f4d\u5728\u7ed8\u56fe\u65f6\u5bb9\u6613\uff0c\u4f46\u5374\u8ddd\u79bb\u4eba\u4eec\u7684\u611f\u53d7\u548c\u7ecf\u6d4e\u793e\u4f1a\u53d1\u5c55\u76f8\u5bf9\u8f83\u8fdc\u3002\u4f8b\u5982\uff0c\u5373\u4fbf\u662f\u8282\u5047\u65e5\uff0c\u5176\u4ed6\u7ecf\u6d4e\u793e\u4f1a\u4e3b\u4f53\u8fd8\u662f\u4f1a\u6709\u4ea4\u6613\u53d1\u751f\u3001\u6709\u53d1\u5c55\u63a8\u8fdb\u7684\u3002<\/p>\n\n\n\n

\u6298\u4e2d\u7684\u505a\u6cd5\u5c31\u662f\u4ee5\u81ea\u7136\u65e5\u3001\u81ea\u7136\u5468\u4e3a\u8ba1\u7b97\u5355\u4f4d\uff0c\u540c\u65f6\u517c\u987e\u4ea4\u6613\u65e5\u548c\u4ea4\u6613\u5468\u3002\u8fd9\u5c31\u9762\u4e34\u7740\u8981\u8ba1\u7b97\u67d0\u4e00\u81ea\u7136\u65e5\u3001\u81ea\u7136\u5468\u662f\u5426\u6709\u4ea4\u6613\uff0c\u6216\u8005\u67d0\u4e2a\u4ea4\u6613\u65e5\u5f52\u5c5e\u4e8e\u67d0\u4e2a\u4ea4\u6613\u5468\u3002
\u5982\u6b64\u4ee5\u6765\uff0c\u60c5\u51b5\u5c31\u53d8\u5f97\u7a0d\u5fae\u590d\u6742\u4e00\u4e9b\uff0c\u6d89\u53ca\u5230\u5386\u6cd5\u7684\u5404\u79cd\u63a8\u7b97\u3002<\/p>\n\n\n\n

\u5728UfqiLong\u6709\u798f\u91d1\u878d\u4e2d\uff0c\u65e5\u671f\u7684\u8ba1\u7b97\u65e2\u6709\u5728\u5ba2\u6237\u7aef\u7ed8\u56fe\u65f6\u7684JavaScript\u7b97\u6cd5\uff0c\u4e5f\u6709\u5728\u670d\u52a1\u5668\u7aef\u8ba1\u7b97\u5206\u65f6\u6bb5\u6536\u76ca\u7387\u7684Java\u7b97\u6cd5\u3002\u6839\u636e\u5206\u6790\uff0c\u6211\u4eec\u53d1\u73b0\u5982\u679c\u951a\u5b9a\u65e5\u671f\u4e2d\u7684\u5468\u4e94Friday\u8fd9\u4e2a\u65f6\u95f4\u70b9\uff0c\u5e76\u5206\u522b\u8ba1\u7b97\u5f53\u524d\u4ea4\u6613\u65e5\u3001\u4ea4\u6613\u5468\u4e0e\u524d\u4e00\u4e2a\u5468\u4e94\u7684\u65f6\u95f4\u5dee\uff0c\u5982\u679c\u65f6\u95f4\u5dee\u5728\u4e03\u5929\u4e4b\u5185\uff0c\u8bf4\u660e\u662f\u5728\u4e00\u5468\u4e4b\u5185\uff0c\u5982\u679c\u65f6\u95f4\u5dee\u5728\u4e03\u5929\u4e4b\u5916\uff0c\u8bf4\u660e\u5df2\u7ecf\u51fa\u79bb\u4e86\u4e00\u5468\u3002<\/p>\n\n\n\n

\u8fd9\u6837\u5728\u9047\u5230\u8282\u5047\u65e5\u7b49\u975e\u4ea4\u6613\u65e5\u7684\u60c5\u51b5\u65f6\uff0c\u5c31\u53ef\u4ee5\u6839\u636e\u524d\u4e00\u4e2a\u5468\u4e94\u7684\u65f6\u95f4\u6233\u548c\u5f53\u524d\u7684\u65f6\u95f4\u6233\uff0c\u5206\u6790\u51fa\u524d\u4e00\u5468\u6216\u8005\u672c\u5468\u67090\u4e2a\uff0c1\u4e2a\uff0c2\u4e2a\uff0c3\u4e2a\uff0c4\u4e2a\uff0c\u8fd8\u662f5\u4e2a\u4ea4\u6613\u65e5\uff0c\u4ece\u800c\u5f97\u51fa\u672c\u5468\u7684\u6da8\u8dcc\u5e45\u3002<\/p>\n\n\n\n

\u539f\u6587\u9996\u53d1\uff1a https:\/\/ufqi.com\/blog\/ufqifina-javascript-tofixed\/<\/a> \uff0c -R\/n2SQ<\/a><\/strong><\/p>\n\n\n\n

\n\n\n\n
\"\"<\/a>
\u6709\u798f\u91d1\u878dUfqiFina : https:\/\/ufqi.com\/finance<\/figcaption><\/figure>\n\n\n\n

\u6709\u798f\u91d1\u878d \u662f\u4e00\u4e2a\u65e8\u5728\u4fc3\u8fdb\u8d22\u5bcc\u7a33\u6b65\u589e\u957f\u7684\u5de5\u5177\u5e73\u53f0\u3002
UfqiFina is a platform of tools designed to promote wealth growth steadily.<\/p>\n","protected":false},"excerpt":{"rendered":"

UfqiFina\u6709\u798f\u91d1\u878d\u57fa\u91d1\u677f\u5757\u63d0\u4f9b\u4e86\u4e00\u79cd\u67e5\u8be2\u8bc1\u5238\u6295\u8d44\u57fa\u91d1\u7684\u6a21\u62dfK\u7ebf\u56fe\u7684\u65b9\u6cd5\u3002 … \u7ee7\u7eed\u9605\u8bfb →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":2815,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[7,6],"tags":[496,316,495,497],"_links":{"self":[{"href":"https:\/\/ufqi.com\/blog\/wp-json\/wp\/v2\/posts\/2814"}],"collection":[{"href":"https:\/\/ufqi.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ufqi.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ufqi.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ufqi.com\/blog\/wp-json\/wp\/v2\/comments?post=2814"}],"version-history":[{"count":7,"href":"https:\/\/ufqi.com\/blog\/wp-json\/wp\/v2\/posts\/2814\/revisions"}],"predecessor-version":[{"id":2823,"href":"https:\/\/ufqi.com\/blog\/wp-json\/wp\/v2\/posts\/2814\/revisions\/2823"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ufqi.com\/blog\/wp-json\/wp\/v2\/media\/2815"}],"wp:attachment":[{"href":"https:\/\/ufqi.com\/blog\/wp-json\/wp\/v2\/media?parent=2814"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ufqi.com\/blog\/wp-json\/wp\/v2\/categories?post=2814"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ufqi.com\/blog\/wp-json\/wp\/v2\/tags?post=2814"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}