CTimmerman

[
	{
		"key": "ctrl+f9",
		"command": "editor.debug.action.goToNextBreakpoint"
	},
	{
		"key": "ctrl+shift+f9",
		"command": "editor.debug.action.goToPreviousBreakpoint"
	},
	{

CTimmerman

Coal ash contains more energy than was gained from burning the coal.

https://www.world-nuclear.org/information-library/facts-and-figures/heat-values-of-various-fuels.aspx

Natural uranium, in FNR                28,000,000 MJ/kg [so 28e9 J/g]
Hard black coal (IEA definition)            >23.9 MJ/kg
Hard black coal (Australia & Canada)        c. 25 MJ/kg [so 25e3 J/g and 207.25 g/mol according to https://pubchem.ncbi.nlm.nih.gov/compound/1-Anthrylmethanolate]
Sub-bituminous coal (IEA definition)    17.4-23.9 MJ/kg
Sub-bituminous coal (Australia & Canada)    c. 18 MJ/kg
Lignite/brown coal (IEA definition)         <17.4 MJ/kg

CTimmerman

https://www.youtube.com/watch?v=Y_B6VADhY84
1: Test early and often so you know where you were wrong.
2: Space out sessions so you know it's long term knowledge.
3: Do other stuff in between so it doesn't get boring.

CTimmerman

"""Rainbow print loop using ANSI escape sequences. Press Ctrl+C to stop.
By Cees Timmerman
2020-03-06 First version.
2024-03-27 Fixed on Windows 11."""
import time

CSI = "\x1b[" # Control Sequence Introducer.
# https://en.wikipedia.org/wiki/ANSI_escape_code#Fe_Escape_sequences
# On Windows 11, C1 control code 155 "\x9b" only works the same in VS Code.
# https://github.com/microsoft/terminal/issues/10310

CTimmerman

"""Ported from https://www.java67.com/2018/03/how-to-implement-radix-sort-in-java.html
Sort an integer list in-place using least significant digit radix sort in Python.
Usage:
>>> x = [180, 50, 10, 30, 10, 29, 60, 0, 17, 24, 12]; radix_sort(x); x
[0, 10, 10, 12, 17, 24, 29, 30, 50, 60, 180]

Time Complexity of Solution:
	Best Case O(k*n); Average Case O(k*n); Worst Case O(k*n),
	where k is the length of the longest number and n is the
	size of the input array.

CTimmerman

# pylint: disable=broad-except, invalid-name, redefined-builtin
"""CRUD API demo in Python with Flask.

2019-08-29 https://blog.rapidapi.com/how-to-build-an-api-in-python/ simplified by Cees Timmerman.
2022-05-09 Polished.
"""
import random
from flask import Flask, request

CTimmerman

Revert the full commit

Sometimes you may want to undo a whole commit with all changes. Instead of going through all the changes manually, you can simply tell git to revert a commit, which does not even have to be the last one. Reverting a commit means to create a new commit that undoes all changes that were made in the bad commit. Just like above, the bad commit remains there, but it no longer affects the the current master and any future commits on top of it.

git revert {commit_id}'

About History Rewriting

Delete the last commit

Deleting the last commit is the easiest case. Let's say we have a remote origin with branch master that currently points to commit dd61ab32. We want to remove the top commit. Translated to git terminology, we want to force the master branch of the origin remote repository to the parent of dd61ab32:

CTimmerman

#!/usr/bin/env bash

echo "Benchmark for Fibonacci numbers with Python3, Cython and PyPy"

echo '
def fib(n):
    "Return the n-th Fibonacci number."
    i = 0
    a, b = 0, 1
    if n < 2:

CTimmerman

# -*- coding: utf-8 -*-
from bottle import route, run


@route('/')
def index():
    return '<h1>Hello World/h1>'


run(host='localhost', port=8000)

CTimmerman

/* Calculate the sum of upVotes, https://hackernoon.com/javascript-performance-test-for-vs-for-each-vs-map-reduce-filter-find-32c1113f19d7
Node v10.15.3 on Win10:
reduce: 0.171ms
101
for loop: 0.005ms
101
for each: 0.018ms
101
map: 0.062ms
101