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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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How do I squash two non-consecutive commits?
...an editor, and you see a file like this, ex: git rebase --interactive HEAD~4
pick aaaaaaa Commit A
pick bbbbbbb Commit B
pick ccccccc Commit C
pick ddddddd Commit D
# Rebase aaaaaaa..ddddddd onto 1234567 (4 command(s))
#
# Commands:
# p, pick = use commit
# r, reword = use commit, but edit the com...
log4j logging hierarchy order
What is the hierarchy of log4j logging?
6 Answers
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How to open a file for both reading and writing?
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Android - shadow on text?
...="AudioFileInfoOverlayText">
<item name="android:paddingLeft">4px</item>
<item name="android:paddingBottom">4px</item>
<item name="android:textColor">#ffffffff</item>
<item name="android:textSize">12sp</item>
<item name="andro...
Override compile flags for single files
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FraserFraser
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What is phtml, and when should I use a .phtml extension rather than .php?
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KingCrunch
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answered Aug 8 '12 at 6:48
AlexAlex
21...
How can I catch a “catchable fatal error” on PHP type hinting?
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edited Mar 18 '16 at 8:54
answered Mar 18 '10 at 9:09
Vol...
Difference between \A \z and ^ $ in Ruby regular expressions
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