cls

#include <array>
#include <tuple>

constexpr std::array<char, 4> base64(uint8_t octet0, uint8_t octet1, uint8_t octet2)
{
    constexpr std::array<char, 64> table = {
        'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 
        'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
        'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
        'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',

cls

#include <stdio.h>

static const unsigned char braille[0x100] = {
	0x40, 0x7c, 0x48, 0x70, 0x78, 0x68, 0x6f, 0x44, 0x58, 0x5c, 0x54, 0x56, 0x42, 0x64, 0x72, 0x4c,
	0x7f, 0x61, 0x63, 0x69, 0x79, 0x71, 0x6b, 0x7b, 0x73, 0x6a, 0x52, 0x46, 0x66, 0x76, 0x74, 0x62,
	0x00, 0x3c, 0x08, 0x30, 0x38, 0x28, 0x2f, 0x04, 0x18, 0x1c, 0x14, 0x16, 0x02, 0x24, 0x32, 0x0c,
	0x3f, 0x21, 0x23, 0x29, 0x39, 0x31, 0x2b, 0x3b, 0x33, 0x2a, 0x12, 0x06, 0x26, 0x36, 0x34, 0x22,
	0x6e, 0x41, 0x43, 0x49, 0x59, 0x51, 0x4b, 0x5b, 0x53, 0x4a, 0x5a, 0x45, 0x47, 0x4d, 0x5d, 0x55,
	0x4f, 0x5f, 0x57, 0x4e, 0x5e, 0x65, 0x67, 0x7a, 0x6d, 0x7d, 0x75, 0x77, 0x50, 0x7e, 0x60, 0x6c,
	0x2e, 0x01, 0x03, 0x09, 0x19, 0x11, 0x0b, 0x1b, 0x13, 0x0a, 0x1a, 0x05, 0x07, 0x0d, 0x1d, 0x15,

cls

#!/bin/sh

pattern="$1"
shift

if [ $# -gt 1 ]
then
	GREP_OPTIONS="$GREP_OPTIONS --with-filename"
	export GREP_OPTIONS
fi

cls

(defun sample-list (items &optional (size 1))
  (let ((sample (make-array size :fill-pointer 0)))
    (loop for item in items
          for enum from 1
          if (<= enum size)
            do (vector-push item sample)
          else
            do (let ((rand (random enum)))
                 (when (< rand size)
                   (setf (aref sample rand) item)))

cls

fun derivative (f : real -> real) (x : real) : real =
  let val pos = Real.nextAfter (x, Real.posInf)
      val neg = Real.nextAfter (x, Real.negInf)
  in
    (f pos - f neg) / (pos - neg)
  end

cls

exception NotFound

fun mk_idmap (mk_id : unit -> 'b) : ''a list -> ''a -> 'b =
  foldl
    (fn (x, acc) =>
      let val new_id = mk_id () in
        fn id => if id = x then new_id else acc id
      end)
    (fn _ => raise NotFound)

cls

#!/bin/sh

expr="$1"
shift

pattern="$(printf "%s" "$expr" | sed -n 's/^s\/\(\([^\\\/]\|\\.\)*\)\/\([^\\\/]\|\\.\)*\/g\?$/\1/p')"

if [ -z "$pattern" ]
then
    printf "usage: git sed s/lhs/rhs/[g] [file...]\n" > /dev/stderr

cls

#include <stdint.h>
#include <string.h>

void
row_align(uint8_t *dst, const uint8_t *src, const size_t width_in_bits, const size_t height)
{
	const size_t width_in_whole_bytes = width_in_bits / 8;

	if (width_in_bits % 32 == 0) { // word-aligned
		memcpy(dst, src, width_in_whole_bytes * height);

cls

#include <array>

enum Base { A, C, T, G };

constexpr Base base(char c)
{
    return static_cast<Base>((c >> 1) & 0b11);
}

static_assert(base('A') == Base::A);

cls

#include <type_traits>

namespace type_list {

class nil {};

template<class Head, class Tail>
class cons {};

// map f []     = []