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<script type="text/javascript">(async () => { | |
const currentScript = document.currentScript; // scoped to this IIFE, does not pollute global namespace or vanish on future event loop ticks | |
// You are 100% free to do async stuff in this block | |
console.info(await 42); | |
// ... // | |
})().then((value) => {if (value) !== undefined console.debug(value);});</script> |
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/** | |
* A nonnegative integer. | |
* @typedef {number} NaturalNumber | |
*/ | |
/** | |
* Datatype representing a polynomial. "5X^3 + X + 2" is represented by "[2, 1, , 5]". | |
* Must have no trailing zeroes. "0" is represented by "[]". | |
* Array slots containing 0 are equivalent to empty (sparse) array slots. | |
* @typedef {Array.<NaturalNumber>} Polynomial |
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/* | |
* Calculate the number of days since the start of the Gregorian calendar. | |
* @param {Date} [date] - The reference date. Defaults to the current instant. | |
* @param {boolean} [useLocalTime] - Whether to calculate in local time. WARNING: By default, UTC is used; this will, for instance, give a Tuesday result when run at 10pm on a Monday in the United States. | |
* @returns {number} | |
*/ | |
export function gregorianDateInteger(d, useLocalTime) { | |
if (d === undefined) d = new Date(); | |
if (useLocalTime === undefined) useLocalTime = false; |
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import threading | |
def _thread_start_immed(*a, **k): | |
"""Usage: | |
@_thread_start_immed("my background thread") | |
def t(name): | |
import time | |
time.sleep(3) |
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const END_OF_FIELD = Symbol('\u001f'); | |
const END_OF_RECORD = Symbol('\u001e'); | |
export async function* csv_iterate(text_stream) { | |
// public iterator. | |
if (typeof text_stream === 'string') | |
text_stream = [text_stream]; |
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#!/usr/bin/env python3 | |
__all__ = ['logical_xor'] | |
def logical_xor(a, b): | |
# technically, all of the parentheses on the following line may be removed | |
return ((not b) and a) or ((not a) and b) | |
# correct | |
assert logical_xor(True, False) |
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def is_dir_writable(path='.', *, _q=None): | |
import multiprocessing as mp | |
from queue import Empty | |
import tempfile | |
if _q is None: | |
# caller | |
_q = mp.Queue() | |
p = mp.Process( | |
target=is_dir_writable, # IF YOU RENAME THE FUNCTION ENSURE YOU ALSO RENAME ITS INVOCATION HERE | |
args=[path], |
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import ctypes | |
from ctypes import GetLastError, WinError, byref, create_unicode_buffer | |
from uuid import UUID | |
__all__ = ['wintypes_GUID'] | |
_CLSIDFromString = ctypes.windll.Ole32['CLSIDFromString'] | |
_CLSIDFromString.argtypes = [ctypes.c_wchar_p, ctypes.c_void_p] | |
_CO_E_CLASSSTRING = ctypes.c_int(0x800401F3).value # nominally positive, but physically negative on most platforms |
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#!/usr/bin/env python3 | |
from Crypto.Cipher import AES # https://pypi.org/project/pycryptodome/ | |
from Crypto.Hash import SHAKE256 | |
from types import SimpleNamespace | |
def _demo(): | |
# DEMO | |
from pqc.kem import mceliece6960119f as kemalg # https://pypi.org/project/pypqc/ |
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defmodule FooWeb.Util do | |
# https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#valid-local-date-and-time-string | |
@spec parse_web_time!(String.t()) :: NaiveDateTime.t() | |
@spec parse_web_time!(String.t(), Calendar.time_zone()) :: DateTime.t() | |
@spec parse_web_time!(String.t(), Calendar.time_zone(), Calendar.time_zone_database()) :: DateTime.t() | |
def parse_web_time!(<<s::binary-size(16)>>) do | |
Timex.parse!(s, "{YYYY}-{0M}-{0D}T{h24}:{m}") | |
end | |
def parse_web_time!(<<s::binary-size(19)>>) do | |
Timex.parse!(s, "{YYYY}-{0M}-{0D}T{h24}:{m}:{s}") |
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