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What exactly is metaprogramming?
...data structure. This is known as homoiconicity. Secondly, LISP code can be converted into data easily using QUOTE. For example (+ 1 2 3) adds 1+2+3 and (QUOTE (+ 1 2 3)) creates an expression that adds 1+2+3 when evaluated. Thirdly, LISP provided a meta-circular evaluator that allows you to use the ...
URL query parameters to dict python
...e the difference with parse_qls is that since it returns a list of tuples, converting that to a dict will keep the last value instead of the first. This of course assumes there were multiple values to begin with.
– reubano
Apr 29 '18 at 10:21
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MySQL indexes - what are the best practices?
...or selecting using a WHERE clause but sometimes it doesn't seem so black and white.
7 Answers
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raw vs. html_safe vs. h to unescape html
... a boolean in string so that the string is considered as html save
raw It converts to html_safe to string
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Time complexity of Sieve of Eratosthenes algorithm
...risron What is the problem? It's not the case that "asymptotic complexity" and "amortized complexity" are two different kinds of the same thing. Amortization is just a technique for more carefully counting something, which can happen to be the asymptotic complexity.
– Shreevats...
How do I check if a list is empty?
...wraps your input into an array if it's a list, tuple, etc., and optionally converts it to your chosen dtype. So it's very quick whenever it can be, and it ensures that you just get to assume the input is a NumPy array. We usually even just use the same name, as the conversion to an array won't mak...
Is C++14 adding new keywords to C++?
The C++ Standards Committee tends to shy away from adding new keywords to the language, yet with C++11 that was not the case. Some examples:
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Python progression path - From apprentice to guru
...nd challenging. An URL shortener? Sure, I can do that. Oh, I learnt how to convert numbers from one base to another as a side effect!
This is valid whatever your skill level. You never stop learning. By actively coding in your spare time you will, with little additional effort, come to understand t...
Using Jasmine to spy on a function without an object
...to spy on an imported function, here's what you can do.
In the test file, convert the import of the function from this:
import {foo} from '../foo_functions';
x = foo(y);
To this:
import * as FooFunctions from '../foo_functions';
x = FooFunctions.foo(y);
Then you can spy on FooFunctions.foo ...
Random string generation with upper case letters and digits
...random string of length string_length."""
random = str(uuid.uuid4()) # Convert UUID format to a Python string.
random = random.upper() # Make all characters uppercase.
random = random.replace("-","") # Remove the UUID '-'.
return random[0:string_length] # Return the random string.
p...