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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...
MySQL vs MongoDB 1000 reads
...For example, consider a design that persisted a lot of information about a complicated entity in a normalised fashion. This could easily use dozens of tables in MySQL (or any relational db) to store the data in normal form, with many indexes needed to ensure relational integrity between tables.
Now...
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
...
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
...
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
...
How do I get both STDOUT and STDERR to go to the terminal and a log file?
... tee output
or
./a.out |& tee output
In csh, there is a built-in command called "script" that will capture everything that goes to the screen to a file. You start it by typing "script", then doing whatever it is you want to capture, then hit control-D to close the script file. I don't kn...
How do I include a JavaScript file in another JavaScript file?
... modules in Node.js, which is also supported by most modern browsers.
For compatibility with older browsers, build tools like Webpack and Rollup and/or transpilation tools like Babel can be used.
ES6 Modules
ECMAScript (ES6) modules have been supported in Node.js since v8.5, with the --experiment...
Python circular importing?
...
I think the answer by jpmc26, while by no means wrong, comes down too heavily on circular imports. They can work just fine, if you set them up correctly.
The easiest way to do so is to use import my_module syntax, rather than from my_module import some_object. The former will al...