barisere

/*Pi Day Challenge: compute an estimate of pi by observing the
 *probability
 *that randomly generated points within a square fall inside of a circle
 *inscribed in the square, given that the square's length is the
 *diameter of the circle.
 *
 *Solution by Jonathan Barisere ([email protected])
*/

#include <iostream>

barisere

Demystifying GitHub _{speaker notes}

Umesi Obusor Ezekiel

What is GitHub

• An online collaboration platform for everyone.
• A social coding platform.

barisere

/**
 * This is my first attempt at Problem 8 (Largest product in a series), Project Euler.
 * @see https://projecteuler.net/problem=8
 */

const numbers = `73167176531330624919225119674426574742355349194934
96983520312774506326239578318016984801869478851843
85861560789112949495459501737958331952853208805511
12540698747158523863050715693290963295227443043557
66896648950445244523161731856403098711121722383113

barisere

const deleteRequests = new WeakMap<Element, number>();

const delayDeleteResource = function (resourceId: string, delay: number) {
  const request = new XMLHttpRequest()

  request.open('DELETE', `https://yourdomain/resource/${resourceId}`, true);
  // other steps for initializing the request, attaching listeners, ...

  return setTimeout(request.send.bind(request), delay);
}

barisere

const deleteHandler = {
  handleEvent: (event: Event) => {
    event.stopPropagation();
    const id = event.srcElement.getAttribute('resourceId');
    deleteRequests.set(event.srcElement, delayDeleteResource(id, 10000));
  }
}

barisere

const cancelDeleteRequest = function (source: Element) {
  clearTimeout(deleteRequests.get(source));
  return deleteRequests.delete(source);
}

barisere

const deleteRequestMap = new Map<string, number>();

const deleteResourceOnTimeout = (id: string, delay: number) => setTimeout(() => {
  console.info(`Deleting ${id}`);
  // actually delete id
  deleteRequestMap.delete(id);
}, delay);

const cancelDeleteResource = (id: string) => {
  clearTimeout(deleteRequestMap.get(id));

barisere

router.delete('/resource/:id', (req, res) => {
  const id = req.params.id;
  deleteRequestMap.set(id, deleteResourceOnTimeout(id, 10000));
  res.status(200).json({ cancelId: deleteRequestMap.get(id) }).end();
});

router.get('/resource/:id/cancelDelete', (req, res) => {
  const id = req.params.id;
  clearTimeout(deleteRequestMap.get(id));
  res.status(200).json({ message: 'Request cancelled' }).end();

barisere

// undo-queue.js

"use strict";

const crypto = require("crypto");
const Queue = require("bull");

const undoQueueWorkers = new Map();
const { redis: redisConfig } = require("../config");

barisere

function makeJobId (task) {
  const hash = crypto.createHash("md5");
  hash.update(JSON.stringify(task), "utf8");
  return hash.digest("hex");
}

/**
 * Registers `workerFn` as a function for adding and processing tasks.
 * The tasks are identified by workerFn's name property, so use named functions.
 *