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领域驱动设计系列(三):事件驱动上 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...们先将事件驱动,下一篇展示如何实现同步的事件,以后转换异步那也很容易,让多个接受者处理这个事件,接受者可以是动态的哦,以后老板娘也想知道的话,代码也不用改的亲,好,我先去写实现代码去! 作者: 王德水...
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什么你得学些 TCP 的知识? - 更多技术 - 清泛网 - 专注C/C++及内核技术

...收确认通知之后才能发送。这是 Nagle 算法导致的。 转换到连接的另一端,HAProxy 需要决定如何确认这两个包。在 1.4.18 版本中(我们正在用的版本),它是通过 TCP 延迟确认通知来实现的。延迟确认对 Nagle 算法有非常糟糕的...
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php发送get、post请求的几种方法 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...rray ('foo' => 'bar'); //生成url-encode后的请求字符串,将数组转换字符串 $data = http_build_query($data); $opts = array ( <span style="white-space:pre"> </span>'http' => array ( <span style="white-space:pre"> </span>'method' => 'POST', <span style="white-space:pre"> </...
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Heatmap in matplotlib with pcolor?

... np %pylab inline page = urlopen("http://datasets.flowingdata.com/ppg2008.csv") nba = pd.read_csv(page, index_col=0) # Normalize data columns nba_norm = (nba - nba.mean()) / (nba.max() - nba.min()) # Sort data according to Points, lowest to highest # This was just a design choice made by Yau # in...
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Sorting a Python list by two fields

I have the following list created from a sorted csv 7 Answers 7 ...
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Shell脚本编程30分钟入门 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...段,sed则可以实现更新插入删除等写操作。 ps 查看进程列 grep排除grep自身查找与target相邻的结果awksed插入替换删除xargscurl综合案例 参考资料 Advanced Bash-Scripting Guide,非常详细,非常易读,大量example,既可以当入门教...
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Read file from line 2 or skip header row

... If you want to read multiple CSV files starting from line 2, this works like a charm for files in csv_file_list: with open(files, 'r') as r: next(r) #skip headers rr = csv.reader(r) ...
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How can foreign key constraints be temporarily disabled using T-SQL?

...NT ' + const.const_name + ' FOREIGN KEY ( ' + const.parent_col_csv + ' ) REFERENCES ' + const.ref_obj + '(' + const.ref_col_csv + ') GO' FROM ( SELECT QUOTENAME(fk.NAME) AS [const_name] ,QUOTENAME(schParent.NAME) + '.' + QUOTENAME(OBJECT_name(fkc.parent_object_id)...
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jQuery Ajax File Upload

...t; &lt;th&gt;Select File &lt;/th&gt; &lt;td&gt;&lt;input id="csv" name="csv" type="file" /&gt;&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td colspan="2"&gt; &lt;input type="submit" value="submit"/&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; &lt;/for...
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How to check the extension of a filename in a bash script?

...atement. I am sharing it here in case it helps someone. if [[ ( $file == *.csv ) || ( $file == *.png ) ]] – joelostblom Feb 7 '15 at 1:09 ...