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Python `if x is not None` or `if not x is None`?
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1029
There's no performance difference, as they compile to the same bytecode:
Python 2.6.2 (r262:7...
How do you access a website running on localhost from iPhone browser
...ess network. How do I access localhost from the iPhone? Right now I get a 404 error.
26 Answers
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How to add multiple columns to a table in Postgres?
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answered Mar 10 '11 at 14:15
Erkan HaspulatErkan Haspulat
10.1k66 gold badges3737 silver badges4545 bronze badges
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ng-options with simple array init
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306
You actually had it correct in your third attempt.
<select ng-model="myselect" ng-options=...
Print function log /stack trace for entire program using firebug
...lpful.
– Ravi Teja
Apr 4 '17 at 11:30
✚1 console.warn('[WARN] CALL STACK:', new Error().stack);
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How can one see content of stack with GDB?
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70
Use:
bt - backtrace: show stack functions and args
info frame - show stack start/end/args/loca...
Margin while printing html page
...iour, the user must select 'Print preview' and then set the print size to 100% (default is Shrink To Fit).
A better option for full control on printed margins is to use the @page directive to set the paper margin, which will affect the margin on paper outside the html body element, which is normal...
Android: how to make keyboard enter button say “Search” and handle its click?
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answered Jul 8 '10 at 15:44
Robby PondRobby Pond
69.2k1515 gold badges119119 silver badges114114 bronze badges
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C# 'is' operator performance
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answered Mar 26 '09 at 16:09
Andrew HareAndrew Hare
310k6363 gold badges611611 silver badges614614 bronze badges
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ValueError: numpy.dtype has the wrong size, try recompiling
...ABI backward compatibility. This happened (unintentionally) with numpy 1.4.0.
As a consequence, users that updated numpy to 1.4.0, had binary incompatibilities with all other compiled packages, that were compiled against a previous version of numpy. This requires that all packages with binary extens...