mlliarm

Factoring 10...01

Tools

GNU/Linux factor Bash tool and python3.

Code & results

# bash shell
 $ factor 101

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//header
#pragma GCC target ("avx2")
#pragma GCC optimize ("O3")
#pragma GCC optimize ("unroll-loops")
#include <bits/stdc++.h>

using namespace std;
typedef long long int ll;
typedef long double ld;

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Table Of Content

Skip to the relevant sections if needed.

• 2-min tutorial to do it the quick-and-dirty-way
• Concepts for resolving Git conflicts
• Setting up different editors / tool for using git mergetool
  • Finding out what mergetool editors are supported
• mergetool simple code example for vimdiff
  • Resolving conflict from a Git pull
• Other great references and tutorials

mlliarm

Installing Python 3.7 from source on Ubuntu 18.04

# update system
sudo apt update && sudo apt upgrade -y

# install build tools and python prerequisites
sudo apt install build-essential libssl-dev zlib1g-dev libncurses5-dev libncursesw5-dev libreadline-dev libsqlite3-dev libgdbm-dev libdb5.3-dev libbz2-dev libexpat1-dev liblzma-dev tk-dev libffi-dev

# download and extract python

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Weather CLI app

What

A simple CLI script that tells the weather of any given location.

It uses the https://wttr.in/ service along with a curl.

Why

I love CLI GNU/Linux apps.

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// Link to the original: http://www.jsoftware.com/jwiki/Essays/Incunabulum
// Found at https://news.ycombinator.com/item?id=8533843

typedef char C;

typedef long I;

typedef struct a {
  I t,r,d[3],p[2];
}* A;

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Below are the Big O performance of common functions of different Java Collections.


List                 | Add  | Remove | Get  | Contains | Next | Data Structure
---------------------|------|--------|------|----------|------|---------------
ArrayList            | O(1) |  O(n)  | O(1) |   O(n)   | O(1) | Array
LinkedList           | O(1) |  O(1)  | O(n) |   O(n)   | O(1) | Linked List
CopyOnWriteArrayList | O(n) |  O(n)  | O(1) |   O(n)   | O(1) | Array

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% Source of the particles.pl: https://github.com/mlliarm/particleslogic/blob/master/src/particles.pl

:- object(particle).

	% common properties to all particles
	:- public([
		boson/0, fermion/0,
		mass/1, spin/1, lifetime/1, charge/1
	]).

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Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

Bob Martin's book in Amazon.

---

General rules

1. Follow standard conventions.
2. Keep it simple stupid (KISS). Simpler is always better. Reduce complexity as much as possible.
3. Boy scout rule. Leave the campground cleaner than you found it.
4. Always find root cause. Always look for the root cause of a problem.

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-- Authors: Mike Spivey and Silvija Seres
-- Taken from: https://www.cs.ox.ac.uk/publications/books/fop/dist/fop/chapters/9/Logic.hs,
-- "The fun of programming book", https://www.cs.ox.ac.uk/publications/books/fop/,
-- Chapter 9, Combinators for logic programming
-- Haskell 98 compliant.

module Logic where
import List

-- Section 9.2