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What's the Point of Multiple Redis Databases?
...e of the keys command on one specific kind of data, and wanted to separate it to make that faster.
8 Answers
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Detect if value is number in MySQL
...k in most cases.
SELECT * FROM myTable WHERE concat('',col1 * 1) = col1
It doesn't work for non-standard numbers like
1e4
1.2e5
123. (trailing decimal)
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Catching an exception while using a Python 'with' statement
To my shame, I can't figure out how to handle exception for python 'with' statement. If I have a code:
4 Answers
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Rotating a two-dimensional array in Python
In a program I'm writing the need to rotate a two-dimensional array came up. Searching for the optimal solution I found this impressive one-liner that does the job:
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What's the best way to generate a UML diagram from Python source code? [closed]
...s from heaps of Python source code.
He's primarily interested in the inheritance relationships, and mildly interested in compositional relationships, and doesn't care much about class attributes that are just Python primitives.
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Safest way to convert float to integer in python?
...take a floating point number and return the nearest integer below or above it. However these functions return the answer as a floating point number. For example:
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c++11 Return value optimization or move? [duplicate]
...recisely when copy elision is allowed.
Your second version actively prohibits copy elision. The first version is universally better.
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Is well formed without a ?
Is it valid to have <input> without it being in a <form> ?
7 Answers
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Hash Code and Checksum - what's the difference?
...t all hashcodes make good checksums.
A checksum has a special purpose --- it verifies or checks the integrity of data (some can go beyond that by allowing for error-correction). "Good" checksums are easy to compute, and can detect many types of data corruptions (e.g. one, two, three erroneous bits)...
What is the relation between BLAS, LAPACK and ATLAS
... manuals and I have a general idea of BLAS and LAPACK and how to use them with the very few examples I find, but I can't find any actual examples using ATLAS to see how it is related with these two.
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