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How to prove that a problem is NP complete?

...n "NP-hard"). – j_random_hacker May 15 '13 at 22:46 1 I wouldn't say a) leads to a contradiction,...
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How to select rows with one or more nulls from a pandas DataFrame without listing columns explicitly

... answered Jun 22 '17 at 14:15 Roko MijicRoko Mijic 4,32733 gold badges1818 silver badges3333 bronze badges ...
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SQL DELETE with INNER JOIN

...e=\"evenodd\" d=\"M25.6622 17.6335C27.8049 17.6335 29.3739 16.9402 30.2537 15.6379C30.8468 14.7755 30.9615 13.5579 30.9615 11.9512V6.59049C30.9615 5.28821 30.4833 4.66231 29.4502 4.66231C28.9913 4.66231 28.4555 4.94978 28.1109 5.50789C27.499 4.86533 26.7335 4.56087 25.7005 4.56087C23.1369 4.56087 21...
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Why should Java ThreadLocal variables be static

...e=\"evenodd\" d=\"M25.6622 17.6335C27.8049 17.6335 29.3739 16.9402 30.2537 15.6379C30.8468 14.7755 30.9615 13.5579 30.9615 11.9512V6.59049C30.9615 5.28821 30.4833 4.66231 29.4502 4.66231C28.9913 4.66231 28.4555 4.94978 28.1109 5.50789C27.499 4.86533 26.7335 4.56087 25.7005 4.56087C23.1369 4.56087 21...
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What is the recommended approach towards multi-tenant databases in MongoDB?

...ting 1 – Robins Gupta May 29 '18 at 15:23 add a comment  |  ...
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instanceof Vs getClass( )

...e=\"evenodd\" d=\"M25.6622 17.6335C27.8049 17.6335 29.3739 16.9402 30.2537 15.6379C30.8468 14.7755 30.9615 13.5579 30.9615 11.9512V6.59049C30.9615 5.28821 30.4833 4.66231 29.4502 4.66231C28.9913 4.66231 28.4555 4.94978 28.1109 5.50789C27.499 4.86533 26.7335 4.56087 25.7005 4.56087C23.1369 4.56087 21...
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Why use symbols as hash keys in Ruby?

...2.2 – Marc-André Lafortune Jan 20 '15 at 18:28 2 Great answer! On a trolling side, your "short a...
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What is the default form HTTP method?

...e=\"evenodd\" d=\"M25.6622 17.6335C27.8049 17.6335 29.3739 16.9402 30.2537 15.6379C30.8468 14.7755 30.9615 13.5579 30.9615 11.9512V6.59049C30.9615 5.28821 30.4833 4.66231 29.4502 4.66231C28.9913 4.66231 28.4555 4.94978 28.1109 5.50789C27.499 4.86533 26.7335 4.56087 25.7005 4.56087C23.1369 4.56087 21...
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How do I include inline JavaScript in Haml?

... | edited Apr 9 '15 at 14:55 ArnoHolo 30122 silver badges1313 bronze badges answered Mar 16 '12...
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Changing the color of the axis, ticks and labels for a plot in matplotlib

...values2=[-1000,-800,-600,-400,-200] y_values2=[10,20,39,40,50] x_values3=[150,200,250,300,350] y_values3=[-10,-20,-30,-40,-50] fig=plt.figure() ax=fig.add_subplot(111, label="1") ax2=fig.add_subplot(111, label="2", frame_on=False) ax3=fig.add_subplot(111, label="3", frame_on=False) ax.plot(x_val...