florabtw

	public BigInteger derangement(int num) {
		if (num == 0) {
			return BigInteger.ONE;
		}

		BigDecimal sum = BigDecimal.ZERO;
		for (int i = 0; i <= num; i++) {
			BigDecimal fact = new BigDecimal(factorial(i));
			BigDecimal toAdd = BigDecimal.valueOf(Math.pow(-1, i)).divide(fact, MathContext.DECIMAL128);
			sum = sum.add(toAdd);

florabtw

// TKK = hours since epoch
var window = {
  TKK: parseInt(new Date().getTime() / 1000 / 60 / 60)
};

var t  = "a";
var cb = "&";
var mf = "=";
var k  = "";
var dd = ".";

florabtw

// TKK = hours since epoch
var window = {
  TKK: parseInt(new Date().getTime() / 1000 / 60 / 60)
};

var t  = "a";
var dd = ".";
var Vb = "+-a^+6";
var Tb = "+";
var Ub = "+-3^+b+-f";

florabtw

Nick's Scala Notes

Basics

This section should be most of the things you need to get going. The goal is that you can read most scala code and write your own simple applications. (Also check out Intermediate and Advanced)

The REPL (Scala playground)

florabtw

import akka.Done
import akka.actor.ActorSystem
import akka.http.scaladsl.Http
import akka.http.scaladsl.model.StatusCodes
import akka.http.scaladsl.model.ws.TextMessage.Strict
import akka.http.scaladsl.model.ws.{Message, TextMessage, WebSocketRequest}
import akka.stream.scaladsl.{Flow, Keep, Sink, Source, SourceQueue}
import akka.stream.{ActorMaterializer, OverflowStrategy}

import scala.concurrent.ExecutionContext.Implicits.global

florabtw

/* Downloads 'Hello, World', spoken in English, to ./hello.mp3 */

const http = require('https');
const fs = require('fs');

/* Set up handler for response from initial POST request */
function handlePostResponse(data) {
  const response = JSON.parse(data); // parse response body from POST

florabtw

#! /bin/bash

curl \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{ "data": { "voice": "en-US", "text": "Hello, world!" } }' \
  https://api.soundoftext.com/sounds

florabtw

ALL of the falsy values:

• ""
• 0, -0, NaN
• null, undefined
• false

The empty array is truthy. However, when loosely compared, it is coerced into an empty string, which is falsy. So,

florabtw

module Actions
  class Increment
    def self.call(state)
      { count: state[:count] + 1 }
    end
  end

  class Decrement
    def self.call(state)
      { count: state[:count] - 1 }

florabtw

const soundoftext = (() => {
  const API_URL = 'https://api.soundoftext.com';

  const urls = {
    base: 'https://api.soundoftext.com',
    request: () => `${urls.base}/sounds`,
    status: id => `${urls.base}/sounds/${id}`,
  };

  const bodies = {