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Elegant ways to support equivalence (“equality”) in Python classes
...n2 # False -- oops
So, Python by default uses the object identifiers for comparison operations:
id(n1) # 140400634555856
id(n2) # 140400634555920
Overriding the __eq__ function seems to solve the problem:
def __eq__(self, other):
"""Overrides the default implementation"""
if isinstance...
SHA512 vs. Blowfish and Bcrypt [closed]
...been recognized that, while not exploitable now, have led to the the SHA-3 competition for new hash algorithms. Also, keep in mind that the study of hash algorithms is "newer" than that of ciphers, and cryptographers are still learning about them.
Even though bcrypt as a whole hasn't had as much sc...
What is the relationship between Looper, Handler and MessageQueue in Android?
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How does the Amazon Recommendation feature work?
What technology goes in behind the screens of Amazon recommendation technology? I believe that Amazon recommendation is currently the best in the market, but how do they provide us with such relevant recommendations?
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What is an efficient way to implement a singleton pattern in Java? [closed]
...ust a class with a feature. if you can list the instances of your class at compile time, use an enum.
– Amir Arad
Oct 7 '08 at 7:17
7
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How to set the prototype of a JavaScript object that has already been instantiated?
Suppose I have an object foo in my JavaScript code. foo is a complex object and it is generated somewhere else. How can I change the prototype of the foo object?
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List of all index & index columns in SQL Server DB
...r his AND ...s without worrying about which was first. See: stackoverflow.com/a/8149183/1160796 and stackoverflow.com/a/242831/1160796
– basher
Dec 4 '14 at 16:34
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Array.Copy vs Buffer.BlockCopy
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Completely agree. There's too much room for error with Buffer.BlockCopy. Keep it simple, and don't try to squeeze any juice out of your program until you know where the juice is (profiling).
– Stephen
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When should I use cross apply over inner join?
...N will work as well?
See the article in my blog for detailed performance comparison:
INNER JOIN vs. CROSS APPLY
CROSS APPLY works better on things that have no simple JOIN condition.
This one selects 3 last records from t2 for each record from t1:
SELECT t1.*, t2o.*
FROM t1
CROSS APPLY
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