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Why does C++ not have reflection?
...work to add, and the C++ committee is fairly conservative, and don't spend time on radical new features unless they're sure it'll pay off. (A suggestion for adding a module system similar to .NET assemblies has been made, and while I think there's general consensus that it'd be nice to have, it's...
Right way to reverse pandas.DataFrame?
...lith Some libraries expect the data frame to be indexed. For example, some time series forecasting libraries expect an indexed frame as input so that it can model a time series while remaining agnostic to the time step (day, month, year, etc.). So you may be working with a data frame, do a transform...
Example use of “continue” statement in Python?
...t be reproduced without it, although not having it can be expensive in run-time.
– Sparr
Jul 14 '14 at 15:27
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Conditionally use 32/64 bit reference when building in Visual Studio
...orks with your x86 and x64 dlls.
Resolution of correct x86/x64-dlls at runtime
Steps:
Use AnyCPU in csproj
Decide if you only reference the x86 or the x64 dlls in your csprojs. Adapt the UnitTests settings to the architecture settings you have chosen. It's important for debugging/running the tes...
How can I add an empty directory to a Git repository?
...ve places you intend to put code, but no code, and you won't even take the time to echo "place for models" >> README, then what you have is an idea not a commit. It is not of interest to git. Saying "I want the running app to have XYZ empty directories" is a runtime problem, not a source prob...
LINQ: Distinct values
...e hash code means that every previously returned element is examined every time. A more robust hash code would speed things up because it would only compare against elements in the same hash bucket. Zero is a reasonable default, but it might be worth supporting a second lambda for the hash code.
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how to ignore namespaces with XPath
... The namespace name itself remains constant, but the Schemas (XSD) are sometimes client-generated i.e. unknown to me. Then i am left with basically three choices :
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Remove an entire column from a data.frame in R
...me, when the column names are known (as opposed to being determined at run-time), I like the subset() syntax. E.g. for the data-frame
df <- data.frame(a=1:3, d=2:4, c=3:5, b=4:6)
to remove just the a column you could do
Data <- subset( Data, select = -a )
and to remove the b and d column...
Wolfram's Rule 34 in XKCD [closed]
...pammers are using W's-34 in headers to redirect searches. As, spammers sometimes work for porn sites, the author created w-34 related porn by merely calling 34 on it. Holy recursion batman.
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Why does HTML think “chucknorris” is a color?
...olour. As the string starts off as 9 characters, we keep the second C this time around hence it ends up in the final colour value.
I originally encountered this when someone pointed out you could do color="crap" and, well, it comes out brown.
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