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What is the difference between NaN and None?

...od = pd.Series([1, np.nan]) In [13]: s_bad.dtype Out[13]: dtype('O') In [14]: s_good.dtype Out[14]: dtype('float64') Jeff comments (below) on this: np.nan allows for vectorized operations; its a float value, while None, by definition, forces object type, which basically disables all efficien...
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git stash blunder: git stash pop and ended up with merge conflicts

...place ... – tanascius Dec 13 '11 at 14:26 1 I think that source code revisioning is a complex pro...
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Select a Dictionary with LINQ

... Quintin RobinsonQuintin Robinson 74.4k1414 gold badges115115 silver badges130130 bronze badges add ...
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How to add new item to hash

... answered Jan 29 '14 at 13:08 AlexanderAlexander 5,48122 gold badges3838 silver badges5454 bronze badges ...
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git diff between two different files

... Steven WexlerSteven Wexler 13.2k66 gold badges4141 silver badges7171 bronze badges 11 ...
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Why does Bootstrap set the line-height property to 1.428571429?

...-size. In this example, Bootstrap is baselining their line-height off of a 14px font-size. The target line-height is 20px: 20px ÷ 14px = 1.428571429 When determining your line-height, you want to make sure you have ample white space between your rows. This allows for ascenders and descenders with...
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IntelliJ 13 - Add Navigate Back/Forward to toolbar?

...on! Common guys! – Lawrence May 13 '14 at 14:21 May be they decide to break the product and then sell again old featur...
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What are '$$' used for in PL/pgSQL

...99 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 45.2525 4.66231 44.6595 4.66231C43.6264 4.66231 43.1481 5.28821 43.1481 6.59048V11.9512C43.1481 13.2535 43.6264 13.8962 44.6595 13.8962C45.6924 13.89...
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Button Click event fires when pressing Enter key in different input (no forms)

...ution. Hot dang. – phatskat Jan 23 '14 at 18:33 5 Been bitten by this issue twice in just a coupl...
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Returning JSON from PHP to JavaScript?

... Kent FredricKent Fredric 53k1414 gold badges101101 silver badges147147 bronze badges ...