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Print a file's last modified date in Bash
...14
/home/joanne/Dropbox/Comp:2013-05-05
/home/joanne/Dropbox/Comp 150 java.zip:2013-02-11
/home/joanne/Dropbox/Comp 151 Java 2.zip:2013-02-11
/home/joanne/Dropbox/Comp 162 Assembly Language.zip:2013-02-11
/home/joanne/Dropbox/Comp 262 Comp Architecture.zip:2012-12-12
/home/joanne/Dropbox/Comp 345 Im...
python pandas dataframe to dictionary
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mydict = dict(zip(df.id, df.value))
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What is the purpose of setting a key in data.table?
...a very long time.
Consider the following example: suppose I have a table, ZIP, of all the zip codes in the US (>33,000) along with associated information (city, state, population, median income, etc.). If I want to look up the information for a specific zip code, the search (filter) is about 100...
What is the most efficient way to create a dictionary of two pandas Dataframe columns?
...dint(0,10,10000).reshape(5000,2),columns=list('AB'))
In [7]: %timeit dict(zip(df.A,df.B))
1000 loops, best of 3: 1.27 ms per loop
In [8]: %timeit pd.Series(df.A.values,index=df.B).to_dict()
1000 loops, best of 3: 987 us per loop
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App Inventor 2 DynamicComponents 拓展：动态创建AI2组件对象 · App Inventor 2 中文网
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DynamicComponents 拓展
🧩 代码块
异步支持
案例
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DynamicComponents 拓展
.aix 拓展下载（最新版 v2.3.0）：
com.yusufcihan.DynamicComponents.aix
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How to download a Nuget package without nuget.exe or Visual Studio extension?
...As I understand I will be able to extract the .dll files from it (with 7-zip) to use as normal.
6 Answers
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记一次MongoDB性能问题 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...建议我检查一下是不是索引不佳所致，死马当活马医，我激活了Profiler记录慢操作：
mongo> use <DB>
mongo> db.setProfilingLevel(1);
不过结果显示基本都是insert操作（因为我是导入数据为主），本身就不需要索引：
mongo> use <DB>
mongo> ...
Notepad++ htmltidy - unable to find libtidy.dll
...d in earlier versions. See post here.
The solution is to download the 5.9 ZIP file from here, then copy the plugins\config folder to the Notepad++\plugins folder.
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How to perform better document version control on Excel files and SQL schema files
...sions.
The same is true for .xlsx if you decompress them. .xlsx files are zipped up directories of XML files (See How to properly assemble a valid xlsx file from its internal sub-components?). Git will view them as binary unless decompressed. It is possible to unzip the .xlsx and track the changes ...
How do I resolve configuration errors with Nant 0.91?
...he problem was Windows 7 security related in that the downloaded NAnt 0.91 zip file needed additional security related configuration to be performed: before extracting, one must right click on the zip file, select Properties and under the General tab, click the button labelled Unblock, then click OK...