hsingtism

const digitKey = [
    "","I","II","III","IV","V","VI","VII","VIII","IX",
    "","X","XX","XXX","XL","L","LX","LXX","LXXX","XC",
    "","C","CC","CCC","CD","D","DC","DCC","DCCC","CM",
    "","M","MM","MMM"
]
const arabicToRoman = n => n.toString().padStart(4, '0').split('').map((v, i) => digitKey[+v + (3 - i) * 10]).join('')
arabicToRoman.validate = n => Number.isInteger(n) && n > 0 && n < 4000

hsingtism

const useBlack = (r, g, b) => [r, g, b]
    .map((v, i) => v < 11 
        ? v / [15496, 4606, 45631][i] 
        : Math.pow(v / 255 + 0.055, 2.4) / [5.348631, 1.589931, 15.74957][i])
    .reduce((a, s) => a + s, 0) 
    > 0.17912878

hsingtism

const noteToHz = note => 440 * 2 ** (
    ("C-D-EF-G-A-B".indexOf(note[0]) + (note.match(/#/g) || []).length - (note.match(/b/g) || []).length - 9) / 12 
    + (Number((note.match(/\d|-/g) || ['4']).join('')) - 4)
)

noteToHz.validate = s => /^[A-G][#b]*-?\d*$/g.test(s)

hsingtism

/*
    Function that converts scientific pitch notation (American standard pitch notation or international pitch notation)
    to a frequency. Input must pass noteToPitch.validate else function may not work as intended.
    First character must be an uppercase letter of the note A-G. Follows is
    '#' for sharp and 'b' for flat. Although not standard, these flat and sharp 
    modifiers may be stacked infinitely. The octave number follows; it can be any integer.
    All pitch is equal temperament at A440. The pitch of standard A can be trivially
    changed.

    Example:

hsingtism

/*
    random64() is a random integer function
    this code uses undefined behavior but it'll be alright
    make sure to include stdint
*/
#include <stdint.h>

// mask to (-2,2] 
// this is just an example, change the exponent bits for other ranges
inline double _22() {

hsingtism

// based on V8 https://v8.dev/blog/math-random.
uint64_t state0 = 0x4D696B696E6C6579;
uint64_t state1 = 0x0000004873696E67;
uint64_t xorshift128plus() {
    uint64_t s1 = state0;
    uint64_t s0 = state1;
    state0 = s0;
    s1 ^= s1 << 23;
    s1 ^= s1 >> 17;
    s1 ^= s0;

hsingtism

#include <stdio.h>

#define BYTES_PER_PIXEL 3
#define FILE_HEADER_SIZE 14
#define INFO_HEADER_SIZE 40

/*
Generates and saves a bitmap image.
  - *image - ptr to array of 8 bit image data. unsigned char image[HEIGHT][WIDTH][BYTES_PER_PIXEL]
      up to down > left to right > blue, green, red

hsingtism

function numToWord(num) {
    if (!Number.isSafeInteger(num) || num < 0) return null
    if (!num) return 'zero '
    const ntt = ['', 'one ', 'two ', 'three ', 'four ', 'five ', 'six ', 'seven ', 'eight ', 'nine ', 'ten ', 'eleven ', 'twelve ', 'thirteen ', 'fourteen ', 'fifteen ', 'sixteen ', 'seventeen ', 'eighteen ', 'nineteen ']
    let mstr = ''
    let nArr = num.toString().padStart(18, '0').match(/.{1,3}/g)
    for (let i = 5; i > -1; i--) {
        let wkv = nArr.shift()
        if (!+wkv) continue
        if (+wkv[0]) mstr += ntt[+wkv[0]] + 'hundred '

hsingtism

function useBlack(r, g, b) {
    const e = v => Math.pow(v / 255 + 0.055, 2.4)
    r < 11 ? r /= 15496 : r = e(r) / 5.348631
    g < 11 ? g /= 4606. : g = e(g) / 1.589931
    b < 11 ? b /= 45631 : b = e(b) / 15.74957
    return r + g + b > 0.17912878
}