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cartesian product in pandas

...n unused column name, then add dummy columns with that name, merge, and finally drop the column on the result? Creating, as opposed to reading, data with pandas is just a pain – Bananach Oct 10 '19 at 7:31 ...
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UltiSnips and YouCompleteMe

I have bundles ultisnips and youcompleteme installed on my macvim. The problem is that ultisnips doesn't work because tab is bound by ycm. I tried putting let g:UltiSnipsExpandTrigger = "<s-tab>" so that I can trigger the snippet completion with shift-tab, but it doesn't work for some unknow...
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What's the cause of this FatalExecutionEngineError in .NET 4.5 beta? [closed]

The sample code below occurred naturally. Suddenly my code thew a very nasty-sounding FatalExecutionEngineError exception. I spent a good 30 minutes trying to isolate and minimize the culprit sample. Compile this using Visual Studio 2012 as a console app: ...
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How to programmatically set style attribute in a view

... Generally you can't change styles programmatically; you can set the look of a screen, or part of a layout, or individual button in your XML layout using themes or styles. Themes can, however, be applied programmatically. There i...
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NodeJS / Express: what is “app.use”?

...gt;) for every middleware layer that you want to add (it can be generic to all paths, or triggered only on specific path(s) your server handles), and it will add onto your Express middleware stack. Middleware layers can be added one by one in multiple invocations of use, or even all at once in seri...
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Is the size of C “int” 2 bytes or 4 bytes?

... I know it's equal to sizeof(int). The size of an int is really compiler dependent. Back in the day, when processors were 16 bit, an int was 2 bytes. Nowadays, it's most often 4 bytes on a 32-bit as well as 64-bit systems. Still, using sizeof(int) is the best way to get the size of...
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Python: try statement in a single line

...ther dynamic languages. The safer way (and the prevailing style) is to set all variables to something. If they might not get set, set them to None first (or 0 or '' or something if it is more applicable.) If you do assign all the names you are interested in first, you do have options. The best...
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What is the equivalent of Java's final in C#?

...le difference between the two languages here is that Java by default marks all non-static methods as virtual, whereas C# marks them as sealed. Hence, you only need to use the sealed keyword in C# if you want to stop further overriding of a method that has been explicitly marked virtual in the base c...
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git mv and only change case of directory

...e case there and not have the wrong case appear anywhere in the history at all. You have to be careful if you do this as the commit hashes from then on will be different and others will have to rebase or re-merge their work with that recent past of the branch. This is related to correcting the name...
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Default value in Doctrine

... I use both this and the accepted answer to cover all bases. Also just a note that you can also do: options={"default": 0} Be careful to use " and not ', as it causes errors in my version of doctrine. – Scott Flack Jun 17 '14 at 7:37 ...