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Comparing two dataframes and getting the differences
...ataframes:
>>> df = pd.concat([df1, df2])
>>> df = df.reset_index(drop=True)
group by
>>> df_gpby = df.groupby(list(df.columns))
get index of unique records
>>> idx = [x[0] for x in df_gpby.groups.values() if len(x) == 1]
filter
>>> df.reindex(...
How can I refresh a page with jQuery?
...oad();
});
The reload() function takes an optional parameter that can be set to true to force a reload from the server rather than the cache. The parameter defaults to false, so by default the page may reload from the browser's cache.
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App Inventor 2 拓展参考文档 · App Inventor 2 中文网
... 【Socket】 ClientSocketAI2Ext 拓展加强版：TCP/IP传输协议
【FTP】 FTP 客户端拓展：FTP协议连接、上传、下载、创建、修改目录等
【短信平台接入】 AliSms 拓展：阿里云短信平台接入，短信验证码
【设备信息】 PhoneInfo 拓展：获取...
Tuning nginx worker_process to obtain 100k hits per min
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that formula does not work if keepalive is set to 0s (disabled)
– Tilo
Mar 21 '13 at 5:12
5
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How to maintain a Unique List in Java?
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You can use a Set implementation:
Some info from the JAVADoc:
A collection that contains no duplicate elements. More formally, sets contain no pair of elements e1 and e2 such that e1.equals(e2), and at most one null element. As implie...
TCPServer TCP服务器扩展：在Android设备上创建TCP服务器 · App Inventor 2 中文网
...，并通过 TCP 逐行交换文本消息。消息以行分隔符（CR、LF 或 CRLF）结束。服务器接受客户端连接，一旦建立连接就可以进行双向数据传输。
主要功能
在 Android 设备上创建 TCP 服务器
接受多个客户端连接
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git stash blunder: git stash pop and ended up with merge conflicts
... do two things:
Decide not to merge. The only clean-ups you need are to reset the index file to the HEAD commit to reverse 2. and to clean up working tree changes made by 2. and 3.; git-reset --hard can be used for this.
Resolve the conflicts. Git will mark the conflicts in the working tree. Edit ...
Android: TextView: Remove spacing and padding on top and bottom
...eLine TextView s, one below the other with no spacing in between. I have set the following for all three TextView s.
20 ...
Passing arguments with spaces between (bash) script
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The answer only works for me if I set IFS=$'\n'. No idea why.
– Dominic M
May 20 '19 at 16:02
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snprintf and Visual Studio 2010
... "If the buffer is too small for the text being printed then the buffer is set to an empty string". In contrast snprintf writes a truncated string to the output.
– Andrew Bainbridge
Oct 27 '14 at 20:04
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