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Is multiplication and division using shift operators in C actually faster?
...with the core i7:
(from http://software.intel.com/en-us/forums/showthread.php?t=61481)
The latency is 1 cycle for an integer addition and 3 cycles for an integer multiplication. You can find the latencies and thoughput in Appendix C of the "Intel® 64 and IA-32 Architectures Optimization Refere...
How to enumerate an object's properties in Python?
...). Setting values directly on the dictionary bypasses the object's setter (and/or its parents'). It's quite common in python that more things than meet the eye are happening in the background during attribute setting (e.g. sanitation), using setattr() ensures that you don't miss out, or are forced t...
Why aren't superclass __init__ methods automatically invoked?
...methods of their superclasses, as in some other languages? Is the Pythonic and recommended idiom really like the following?
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__FILE__ macro shows full path
The standard predefined macro __FILE__ available in C shows the full path to the file. Is there any way to short the path? I mean instead of
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Immutability of Strings in Java
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str is not an object, it's a reference to an object. "Hello" and "Help!" are two distinct String objects. Thus, str points to a string. You can change what it points to, but not that which it points at.
Take this code, for example:
String s1 = "Hello";
String s2 = s1;
// s1 and s2 now ...
What's a correct and good way to implement __hash__()?
What's a correct and good way to implement __hash__() ?
6 Answers
6
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How do I implement __getattribute__ without an infinite recursion error?
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..and do I want to always use object? What if I inherit from other classes?
– Greg
Dec 16 '08 at 16:29
1
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When is “i += x” different from “i = i + x” in Python?
I was told that += can have different effects than the standard notation of i = i + . Is there a case in which i += 1 would be different from i = i + 1 ?
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Understanding the main method of python [duplicate]
...ed" % __file__)
Using this convention one can have a file define classes and functions for use in other programs, and also include code to evaluate only when the file is called as a standalone script.
It's important to understand that all of the code above the if __name__ line is being executed, ...
How to print out the method name and line number and conditionally disable NSLog?
I'm doing a presentation on debugging in Xcode and would like to get more information on using NSLog efficiently.
13 Answer...