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ObjectBoxPC / pangram.hs
Last active July 7, 2020 13:48
Simple Haskell program to check if the input (command-line arguments) form a pangram, containing all 26 letters of the English alphabet
import Data.Char (toUpper)
import Data.List (intercalate)
import Data.List.NonEmpty (NonEmpty, nonEmpty, toList)
import System.Environment (getArgs)
data PangramResult = Pangram | MissingLetters (NonEmpty Char)
checkPangram :: String -> PangramResult
checkPangram s = case nonEmpty missingLetters of
Just ls -> MissingLetters ls
@ObjectBoxPC
ObjectBoxPC / git-sct.sh
Created November 25, 2020 20:36
"git sct" script ("show commit with tool") to view the changes made in a commit using a diff tool
#!/bin/sh
# To integrate, place the following into your .gitconfig:
# [alias]
# sct = !path/to/git-sct.sh
if [ $# -lt 1 ]; then
echo "Usage: git sct <revision> [<parent-number>]"
exit 1
fi
@ObjectBoxPC
ObjectBoxPC / shell_start.c
Created November 28, 2020 06:12
Simple program start a shell based on certain inferences (mainly to learn some POSIX C programming)
#include <unistd.h>
#include <pwd.h>
#include <stdlib.h>
#include <string.h>
#include <stddef.h>
/**
* @file
* Utility function to start a shell based on reasonable inferences
*/
@ObjectBoxPC
ObjectBoxPC / andref.cpp
Last active May 1, 2021 03:55
Misusing C++ alternative tokens
#include <utility>
class my_class {
public:
compl my_class() {} // Destructor
};
int main() {
my_class example_obj;
my_class bitand example_ref = example_obj;
@ObjectBoxPC
ObjectBoxPC / makepassword.py
Created May 24, 2021 21:58
Quickly generate random passwords
#!/usr/bin/env python3
import secrets
entropy_bytes = 16
print(secrets.token_urlsafe(entropy_bytes))
@ObjectBoxPC
ObjectBoxPC / califblueprintcovid19.hs
Created May 31, 2021 09:33
Functions implementing California's COVID-19 reopening tiers introduced in August 2020 (not including 2021 updates) https://www.cdph.ca.gov/Programs/CID/DCDC/Pages/COVID-19/COVID19CountyMonitoringOverview.aspx
data RiskTier = Widespread | Substantial | Moderate | Minimal
deriving (Show, Eq)
instance Ord RiskTier where
compare x y = compare (tierNumber x) (tierNumber y)
where
tierNumber t = case t of
Widespread -> 1
Substantial -> 2
Moderate -> 3
@ObjectBoxPC
ObjectBoxPC / StrConv.hs
Created May 31, 2021 09:50
Programs to transform text strings
module StrConv (strConv, charify) where
import System.Environment
import System.Exit
import Data.Char
convertStr convertChar = map $ \c -> case convertChar c of
Just converted -> converted
_ -> c
@ObjectBoxPC
ObjectBoxPC / shc.py
Last active January 4, 2022 09:03
Dump payload from a SMART Health Card https://smarthealth.cards/
# This code is dedicated to the public domain under
# Creative Commons CC0 1.0 Universal <https://creativecommons.org/publicdomain/zero/1.0/>
import base64
import json
import sys
import zlib
shc = input()
@ObjectBoxPC
ObjectBoxPC / makepassword.sh
Created January 4, 2022 09:00
Quickly generate random passwords using built-in utilities (emulating Python's secrets.token_urlsafe: https://gist.github.com/ObjectBoxPC/89206ca79bb26fdc2112233ede121d9d )
#!/bin/sh
ENTROPY_BYTES=16
dd if=/dev/urandom bs="$ENTROPY_BYTES" count=1 2> /dev/null | \
base64 -w 0 | sed -e 's/=//g' -e 's/+/-/g' -e 's/\//_/g'
echo
@ObjectBoxPC
ObjectBoxPC / envelope.tex
Created January 30, 2022 10:23
XeLaTeX template document for printing addresses on envelopes
%Note on rotation: It may be a good idea to rotate the page when printing,
%so that the envelope is in a "portrait" orientation in the printer.
%I tried to use lscape to rotate the text, but that doesn't seem to work with textpos.
%The solution for now is to use an external tool like pdftk
%or the settings in some PDF viewers and printer drivers.
%Suggestions on how to achieve proper rotation in TeX are welcome.
%Settings
%Envelope dimensions (in inches) (US #10 envelopes are 9 1/2 in. x 4 1/8 in.)