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Linq: What is the difference between Select and Where
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community wiki
2 revsDrew Noakes
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is vs typeof
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+1: In the past I wondered why the C# compiler didn't compile typeof(string).TypeHandle to the ldtoken CIL instruction, but it looks like the CLR takes care of it in the JIT. It still takes a few extra opcodes but it's a more generalized application of the optimi...
lenses, fclabels, data-accessor - which library for structure access and mutation is better
...ementation you use.
Many of these libraries also provide a bunch of extra combinators on top, and usually some form of template haskell machinery to automatically generate lenses for the fields of simple record types.
With that in mind, we can turn to the different implementations:
Implementation...
How do I get the resource id of an image if I know its name?
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Does Django scale? [closed]
... and 2.500.000 Users
Disqus: Serving 400 million people with Python.
curse.com: 600k daily visits.
tabblo.com: 44k daily visits, see Ned Batchelder's posts Infrastructure for modern web sites.
chesspark.com: Alexa rank about 179k.
pownce.com (no longer active): alexa rank about 65k.
Mike Malone of P...
How do I get the “id” after INSERT into MySQL database with Python?
... Is lastrowid only available after the current transaction being committed?
– John Wang
Jan 19 '17 at 2:31
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Convert a row of a data frame to vector
...s another, slightly more explicit way to get to the same result.
As @Josh comments below, if you have a not-completely-numeric (alphabetic, factor, mixed ...) data frame, you need as.character(df[1,]) instead.
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Using DNS to redirect to another URL with a path [closed]
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