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Counting the number of True Booleans in a Python List
...ted than just testing for True. See docs.python.org/py3k/library/stdtypes.html#truth. The True = 2 was just to reinforce that the concept of "true" is more complex; with a little bit of extra code (i.e. using bool()) you can make the solution more robust and more general.
– N...
Validating with an XML schema in Python
... etree.DTD
from the tests on http://lxml.de/api/lxml.tests.test_dtd-pysrc.html
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root = etree.XML(_bytes("<b/>"))
dtd = etree.DTD(BytesIO("<!ELEMENT b EMPTY>"))
self.assert_(dtd.validate(root))
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Converting RGB to grayscale/intensity
...t; ^gamma -> Y -> L*
In color science, the common RGB values, as in html rgb( 10%, 20%, 30% ),
are called "nonlinear" or
Gamma corrected.
"Linear" values are defined as
Rlin = R^gamma, Glin = G^gamma, Blin = B^gamma
where gamma is 2.2 for many PCs.
The usual R G B are sometimes written a...
What is memoization and how can I use it in Python?
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See docs.python.org/3/library/functools.html#functools.wraps for why one should use functools.wraps.
– anishpatel
Apr 25 '17 at 2:29
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Why do Java programmers like to name a variable “clazz”? [closed]
...Punctuation is what I was fishing for. unicode.org/faq/punctuation_symbols.html / I wouldn't design C#. In Java, you get away with a method called fnord and a field called fnord without any issues, capitalisation or nonsense words. I think that will suffice as a counter example.
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Truncating all tables in a Postgres database
... to do this.
http://www.postgresql.org/docs/8.3/static/plpgsql-statements.html (section 38.5.4. Executing Dynamic Commands)
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How to keep keys/values in same order as declared?
...ered by default. mail.python.org/pipermail/python-dev/2017-December/151283.html
– sertsedat
Sep 4 '18 at 8:05
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How to test if a string is JSON or not?
... look at examples of valid JSON texs containing only values tools.ietf.org/html/rfc8259#section-13 - RFC 8259 is designed to resolve possible ambiguities and confusions, just like this.
– Relequestual
Apr 19 '19 at 18:25
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No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin '…' is therefor
I'm using .htaccess to rewrite urls and I used html base tag in order to make it work.
11 Answers
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How to split a string literal across multiple lines in C / Objective-C?
...t (integrates with your favorite editors): clang.llvm.org/docs/ClangFormat.html
– Ahmed Fasih
Dec 5 '13 at 16:26
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