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What are the correct version numbers for C#?
... new features: nullable reference-types, Asynchronous streams, Indices and Ranges, Readonly members, using declarations,default interface methods, Static local functions and Enhancement of interpolated verbatim strings.
C# 9.0 still in preview. Expected to be released in November of 2020 along with ...
How do I get user IP address in django?
...
The address ranges assigned for private networks are: 172.16.0.0–172.31.255.255 (16 “class B” networks), 192.168.0.0–192.168.255.255 (1 “class B” network) and 10.0.0.0–10.255.255.255 (1 “class A” or 256 “class B” ne...
Delete specific line number(s) from a text file using sed?
...command>; where <address> can be either a single line like 5 or a range of lines like 5,10, and the command d deletes the given line or lines. The addresses can also be regular expressions, or the dollar sign $ indicating the last line of the file.
– Brian Campbell
...
Git - Undo pushed commits
... that specific commit, and not commits after that. If you want to revert a range of commits, you can do it like this:
git revert <oldest_commit_hash>..<latest_commit_hash>
It reverts the commits between and including the specified commits.
Look at the git-revert man page for more inf...
UnicodeDecodeError: 'ascii' codec can't decode byte 0xef in position 1
...ror: 'ascii' codec can't encode characters in position 1-5: ordinal not in range(128)
>>>
Consult the docs for your linux variant to discover how to make this change permanent.
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What is the ideal data type to use when storing latitude / longitude in a MySQL database?
...ause problems
The point is that when using degrees or radians we know the range of the values - and the fractional part needs the most digits.
The MySQL Spatial Extensions are a good alternative because they follow The OpenGIS Geometry Model. I didn't use them because I needed to keep my database ...
Get parts of a NSURL in objective-c
...le.com:8080/some/path/file.html;params-here?foo=bar#baz
NSURL has a wide range of accessors. You may check them in the documentation for the NSURL class, section Accessing the Parts of the URL. For quick reference:
-[NSURL scheme] = http
-[NSURL resourceSpecifier] = (everything from // to the en...
Suppress Scientific Notation in Numpy When Creating Array From Nested List
...hon Force-suppress all exponential notation when printing numpy ndarrays, wrangle text justification, rounding and print options:
What follows is an explanation for what is going on, scroll to bottom for code demos.
Passing parameter suppress=True to function set_printoptions works only for number...
Python matplotlib multiple bars
...nts).
import numpy as np
import matplotlib.pyplot as plt
N = 3
ind = np.arange(N) # the x locations for the groups
width = 0.27 # the width of the bars
fig = plt.figure()
ax = fig.add_subplot(111)
yvals = [4, 9, 2]
rects1 = ax.bar(ind, yvals, width, color='r')
zvals = [1,2,3]
rects2 = ax....
Generate random numbers following a normal distribution in C/C++
...d standard deviation of a normal variable. An obvious drawback is that the range is limited to ±6 – unlike a true normal distribution.
The Box-Muller transform. This is listed above, and is relatively simple to implement. If you need very precise samples, however, be aware that the Box-Muller tra...