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Should I use 'has_key()' or 'in' on Python dicts?

...$ python -mtimeit -s'd=dict.fromkeys(range(99))' '12 in d' 10000000 loops, best of 3: 0.0983 usec per loop $ python -mtimeit -s'd=dict.fromkeys(range(99))' 'd.has_key(12)' 1000000 loops, best of 3: 0.21 usec per loop While the following observation is not always true, you'll notice that usually, i...
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What's Alternative to Singleton

... The best way is to use a Factory pattern instead. When you construct a new instance of your class (in the factory) you can insert the 'global' data into the newly constructed object, either as a reference to a single instance (wh...
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vs

...You should save...without BOM." The following page says "...it is usually best for interoperability to omit the BOM..." indicating a best practice, but not a requirement: w3.org/International/questions/qa-byte-order-mark – Johann Jun 4 '12 at 18:49 ...
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What is the difference between range and xrange functions in Python 2.X?

...s faster! $ python -m timeit 'for i in range(1000000):' ' pass' 10 loops, best of 3: 90.5 msec per loop $ python -m timeit 'for i in xrange(1000000):' ' pass' 10 loops, best of 3: 51.1 msec per loop Personally, I always use .range(), unless I were dealing with really huge lists -- as you can see,...
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How do I get Fiddler to stop ignoring traffic to localhost?

...est the "adding a period after localhost" suggestion, which I think is the best one. This is especially true in some server environments I work in where localhost is the only thing I can use (due to ActiveX controls, permissions, and whatnot). – Josh Mouch Jul...
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JavaScript variable number of arguments to function

... This solution worked best for me. Thanks. Further information on the arguments keyword HERE. – User2 Apr 30 '14 at 9:18 28 ...
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Let JSON object accept bytes or let urlopen output strings

... I have come to opinion that the question is the best answer :) import json from urllib.request import urlopen response = urlopen("site.com/api/foo/bar").read().decode('utf8') obj = json.loads(response) ...
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Running V8 Javascript Engine Standalone

...ard when it comes to JavaScript consoles. It uses v8, and is probably the best option to use for this. – Tracker1 Sep 20 '13 at 19:53 add a comment  |  ...
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When should I use nil and NULL in Objective-C?

... Best explanation I have heard of the difference (: Thanks. – Jay Oct 14 '09 at 12:58 3 ...
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Are PHP functions case sensitive?

... @Mark Tomlin I disagree. The best practice is to maintain the same case that the manual has, so it should break little, while increasing clarity. – Ben Dauphinee Apr 17 '11 at 13:57 ...