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快速理解 高频对冲套利自动交易（程式化交易） - 更多技术 - 清泛网 - 专注...
...上海的2家暂时都不支持，不过中金所官方网站上，在今年2月份，倒是对套利交易予以政策支持（交易所层面上的手续费及保证金比例优惠），据说，在4月底的期货分析师大会上，中金所负责人对外界宣称，即将推出套利指令，...
构建高并发高可用的电商平台架构实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...协议，由内在高并发的erlanng语言开发；kafka是Linkedin于2010年12月份开源的消息发布订阅系统,它主要用于处理活跃的流式数据,大数据量的数据处理上。
对消息一致性要求比较高的场合需要有应答确认机制，包括生产消息和消费消...
Number of days in particular month of particular year?
... the number of days in that month
YearMonth yearMonthObject = YearMonth.of(1999, 2);
int daysInMonth = yearMonthObject.lengthOfMonth(); //28
Test: try a month in a leap year:
yearMonthObject = YearMonth.of(2000, 2);
daysInMonth = yearMonthObject.lengthOfMonth(); //29
Java 7 and earlier
Crea...
google mock分享（全网最全最好的gmock文档，没有之一） - C/C++ - 清泛网 ...
...学吧。
Google Mock概述
Google Mock（简称gmock）是Google在2008年推出的一套针对C++的Mock框架，它灵感取自于jMock、EasyMock、harcreat。它提供了以下这些特性：
轻松地创建mock类
支持丰富的匹配器（Matcher）和行为（Action）
支持有序...
The character encoding of the HTML document was not declared
...org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>insert page</title></head>
<body>
<?php
$title = $_POST["title"];
$price = $_P...
Resizing SVG in html?
... xmlns:cc="http://creativecommons.org/ns#"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
...
How do I fix “for loop initial declaration used outside C99 mode” GCC error?
... it's not valid C, only with a qualification. It is perfectly valid C; the 1999 standard superseded and replaced the 1990 standard, and the 2011 standard superseded and replaced the 1999 standard (though the latter didn't exist when you originally posted this answer).
– Keith T...
JavaScript equivalent of PHP’s die
.../xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" dir="ltr" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
<script type="text/javascript">
function test1(){
test2();
...
How to calculate number of days between two given dates?
... ((1994,5,15,2019,8,31,False), 9239),
((1999,3,24,2018,2,4,False), 6892),
((1999,6,24,2018,8,4,False),6981),
((1995,5,24,2018,12,15,False),8606),
((1994,8,24,2019,12,15,True),9245),
((2019,12,1...
File system that uses tags rather than folders?
...some example usage:
$ tmsu tag track.mp3 music genre=indie-rock good year=1999
$ tmsu tag melody.mp3 music
$ tmsu tag DC123.jpg photo landscape country=italy year=2014
$ tmsu files music year = 1999
./song.mp3
And the virtual filesystem:
$ mkdir mp
$ tmsu mount mp
$ ls mp
query tags
$ ls tags
c...