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Converting many 'if else' statements to a cleaner approach [duplicate]
...provided in the question boils down to "execute one-and-only-one code path based on an input variable", which is (in my opinion) a pretty good definition of exactly what a switch is supposed to do.
– scubbo
Feb 3 '17 at 1:05
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Evaluating a mathematical expression in a string
...might be possible to break out using introspection:
eval('(1).__class__.__bases__[0].__subclasses__()', {'__builtins__': None})
Evaluate arithmetic expression using ast
import ast
import operator as op
# supported operators
operators = {ast.Add: op.add, ast.Sub: op.sub, ast.Mult: op.mul,
...
Java equivalent to C# extension methods
...werful tool. The main thing there is ability to override different methods based on different generic’s parameters instantiation. This is similar to Haskell’s type classes, and in fact, it looks like they are in C# to support C#’s Monads (i.e. LINQ). Even dropping LINQ syntax, I still don’t ...
How to make lists contain only distinct element in Python? [duplicate]
...n implementation detail and should not be relied upon". Since they're both based on hashes, I'd think set would be the same, but it's not mentioned, so apparently not: docs.python.org/3.6/whatsnew/3.6.html
– Mark
Dec 3 '16 at 11:52
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How to set environment variables in Jenkins?
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Try setting the value based on the output of a shell command.
– Noel Yap
Jun 18 '15 at 23:11
1
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When and why to 'return false' in JavaScript?
...changed it to e.preventDefault() solved a problem with one of my functions based on a namespace touch event. Don’t know why but you gave me the idea. Thanks.
– Garavani
Oct 2 '14 at 12:45
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What does HTTP/1.1 302 mean exactly?
...e the RFC 2616 was still hanging around. Some answers to this question are based in such document, which is no longer relevant nowadays. Quoting Mark Nottingham who, at the time of writing, co-chairs the IETF HTTP and QUIC Working Groups:
Don’t use RFC2616. Delete it from your hard drives, boo...
How to check if a String contains only ASCII?
...letter. But is there a way to quickly find if a String only contains the base characters of ASCII?
12 Answers
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How to convert all tables from MyISAM into InnoDB?
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<?php
// connect your database here first
//
// Actual code starts here
$sql = "SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA = 'your_database_name'
AND ENGINE = 'MyISAM'";
$rs = mysql_query...
Analyze audio using Fast Fourier Transform
...ars this should not be done as antti suggest, by dividing the data equally based on the number of bars. The most useful would be to divide the data into octave parts, each octave being double the frequency of the previous. (ie. 100hz is one octave above 50hz, which is one octave above 25hz).
Depen...