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What is the difference between NaN and None?
... reason to use NaN (over None) is that it can be stored with numpy's float64 dtype, rather than the less efficient object dtype, see NA type promotions.
# without forcing dtype it changes None to NaN!
s_bad = pd.Series([1, None], dtype=object)
s_good = pd.Series([1, np.nan])
In [13]: s_bad.dtype
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Effect of NOLOCK hint in SELECT statements
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edited Apr 15 '15 at 17:44
answered Oct 16 '08 at 20:43
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Why does Razor _layout.cshtml have a leading underscore in file name?
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edited Oct 18 '18 at 14:43
answered Jan 2 '11 at 9:12
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Determining type of an object in ruby
...ery reason.
– tadman
Aug 27 '13 at 14:36
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TypeScript “this” scoping issue when called in jquery callback
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4 Answers
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How do I add a Maven dependency in Eclipse?
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answered Oct 14 '14 at 0:23
Oded BreinerOded Breiner
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Erlang's 99.9999999% (nine nines) reliability
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Directive isolate scope with ng-repeat scope in AngularJS
...vid Miller
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Assign width to half available screen width declaratively
...em twice.
– tomash
Dec 21 '12 at 10:42
2
I never got why you had to declare the layout_width="0dp...
How to use Sphinx's autodoc to document a class's __init__(self) method?
...y class.
– Roger Binns
Jul 9 '11 at 4:21
3
The first alternative worked. In my case it was better...