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@njsmith
njsmith / masked-arrays-and-missing-values-aNEP.rst
Created June 30, 2011 14:48
A alternative-NEP on masking and missing values

A alternative-NEP on masking and missing values

The principle of this aNEP is to separate the APIs for masking and for missing values, according to

  • The current implementation of masked arrays
  • Nathaniel Smith's proposal.
@endolith
endolith / Accent.py
Last active November 19, 2023 00:09
Documenting the matplotlib colormaps
# https://github.com/matplotlib/matplotlib/issues/881
# Several of the ColorBrewer maps are "qualitative", meaning
# they are just a group of colors that can be used together
# for categories of data. So I remapped Accent to segments
# instead of continuous:
# Actually, these should be used with ListedColormap, and
# the number of colors should depend on the number of
# categories in the data, with colors removed from the
# list in a certain order?
@jboner
jboner / latency.txt
Last active November 18, 2024 08:23
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD
@timss
timss / python-daemon_apscheduler.py
Last active April 4, 2020 04:50
A combination of python-daemon and APScheduler
#!/usr/bin/env python
import apscheduler.scheduler
import daemon.runner
import os.path
import sys
import time
class Core():
def __init__(self):

Backing up a GPG private key to a QR code

Use at your own risk! As with any backup method, test out your backup by restoring from it before you trust it.

  1. Install qrcode to generate the QR code:

     pip install qrcode
    
  2. Export the key, piping the output to qr, and save this to a png file:

@simonmichael
simonmichael / accounts.txt
Last active May 30, 2023 09:43
a sample *ledger chart of accounts (first 3 levels): combined personal & business, eg for a freelancer
assets
business
accounts receivable
bank
personal
accounts receivable
bank
cash
gifts
online
@staltz
staltz / introrx.md
Last active November 17, 2024 01:08
The introduction to Reactive Programming you've been missing
Below I collected relevant links and papers more or less pertaining to the subject of tetrahedral meshes.
It's an ever-growing list.
------------------------------
Relevant links:
http://en.wikipedia.org/wiki/Types_of_mesh
http://en.wikipedia.org/wiki/Tetrahedron
http://en.wikipedia.org/wiki/Simplicial_complex
@bkaradzic
bkaradzic / orthodoxc++.md
Last active November 18, 2024 07:53
Orthodox C++

Orthodox C++

What is Orthodox C++?

Orthodox C++ (sometimes referred as C+) is minimal subset of C++ that improves C, but avoids all unnecessary things from so called Modern C++. It's exactly opposite of what Modern C++ suppose to be.

Why not Modern C++?

@FilipDominec
FilipDominec / Abbreviate Journal Names in Bibtex Database.py
Last active October 15, 2023 08:13
Using the translation table from the Jabref program, finds and replaces all scientific journal names to their standardized abbreviated form. First argument is the file to be processed; outputs safely to 'abbreviated.bib'
#!/usr/bin/env python
#-*- coding: utf-8 -*-
# Supporting Python 3
import sys, os, re
try: bibtexdb = open(sys.argv[1]).read()
except: print("Error: specify the file to be processed!")
if not os.path.isfile('journalList.txt'):