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Pandas groupby: How to get a union of strings

... In [5]: df Out[5]: A B C 0 1 0.749065 This 1 2 0.301084 is 2 3 0.463468 a 3 4 0.643961 random 4 1 0.866521 string 5 2 0.120737 ! In [6]: df.dtypes Out[6]: A int64 B float64 C object dtype: object When you apply your own function, t...
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Why are flag enums usually defined with hexadecimal values

... None = 0, Flag1 = 1 << 0, Flag2 = 1 << 1, Flag3 = 1 << 2, Flag4 = 1 << 3, Flag5 = 1 << 4 } share | improve this answer | ...
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Disable a Maven plugin defined in a parent POM

...in our parent/super POM, so it'll inherit the version and so-on. In Maven 3, you'll need to use: <configuration> <skip>true</skip> </configuration> for the plugin. share | ...
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Scripting TFS Command Line for Get Latest Version, Check Out and Check in, programmatically

... | edited May 27 '15 at 13:18 Stefan Steinegger 59.6k1414 gold badges120120 silver badges188188 bronze badges ...
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How to create a new java.io.File in memory?

... 3 Answers 3 Active ...
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How to disable code formatting for some part of the code using comments?

... Since version 13 it's possible to wrap the code with // @formatter:off ... // @formatter:on IntelliJ IDEA v.14+: Preferences > Editor > Code Style > Formatter Control IntelliJ IDEA v.2016+: Preferences > Editor > Code St...
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Can someone explain the HTML5 aria-* attribute?

... 153 ARIA stands for Accessible Rich Internet Applications and is designed to improve the accessibili...
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How to specify data attributes in razor, e.g., data-externalid=“23151” on @this.Html.CheckBoxFor(…)

...m unable to specify values for data- attributes such as data-externalid="23521" 1 Answer ...
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How do I convert an array object to a string in PowerShell?

... 303 $a = 'This', 'Is', 'a', 'cat' Using double quotes (and optionally use the separator $ofs) ...
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pass **kwargs argument to another function with **kwargs

... 163 In the second example you provide 3 arguments: filename, mode and a dictionary (kwargs). But Pyt...