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Best way to replace multiple characters in a string?
...cing two characters
I timed all the methods in the current answers along with one extra.
With an input string of abc&def#ghi and replacing & -> \& and # -> \#, the fastest way was to chain together the replacements like this: text.replace('&', '\&').replace('#', '\#').
T...
How to check BLAS/LAPACK linkage in NumPy and SciPy?
...n about linkage gathered at build time. My output looks like this. I think it means I am using the BLAS/LAPACK that ships with Mac OS.
>>> import numpy as np
>>> np.show_config()
lapack_opt_info:
extra_link_args = ['-Wl,-framework', '-Wl,Accelerate']
extra_compile_args =...
Fastest way to get the first object from a queryset in django?
...follow
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edited Jul 28 at 21:01
Boris
4,70255 gold badges4242 silver badges5252 bronze badges
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How to send an email from JavaScript
I want my website to have the ability to send an email without refreshing the page. So I want to use Javascript.
20 Answers...
How to avoid annoying error “declared and not used”
I'm learning Go but I feel it is a bit annoying that when compiling, I should not leave any variable or package unused.
8 ...
What's Mongoose error Cast to ObjectId failed for value XXX at path “_id”?
...sending a request to /customers/41224d776a326fb40f000001 and a document with _id 41224d776a326fb40f000001 does not exist, doc is null and I'm returning a 404 :
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Calculate distance between 2 GPS coordinates
How do I calculate distance between two GPS coordinates (using latitude and longitude)?
29 Answers
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How to disable Django's CSRF validation?
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edited Oct 1 '19 at 16:36
Lutz Prechelt
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error: ‘uint16_t’ does not name a type - C/C++ - 清泛网 - 专注C/C++及内核技术
error: ‘uint16_t’ does not name a type#include <stdint.h> 解决。 ** * @file stdint.h * Copyright 2012, 2013 MinGW.org project * * Permission is hereby ...#include <stdint.h> 解决。
/**
* @file stdint.h
* Copyright 2012, 2013 MinGW.org project
*
* Permission is hereby granted, ...
In a django model custom save() method, how should you identify a new object?
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Updated: With the clarification that self._state is not a private instance variable, but named that way to avoid conflicts, checking self._state.adding is now the preferable way to check.
self.pk is None:
returns True within a new...