fffergal

class NoCronChildrenTracer(trace_sdk.Tracer):
    '''
    Custom Tracer that breaks the parent relationship for cron tasks.

    This is so we can use a parent based sampler without excluding or including a whole
    cron run. Otherwise we would see one whole run a day with a 1/100 sampling rate. If
    the cron isn't the parent, we can sample its children by trace ID, and preserve the
    whole trace with descendant spans.

    This will also have the benfit of making the UI easier to use, as query results

threepointone

(I'm enjoying doing these raw, barely edited writeups; I hope they're useful to you too)

Feature flags

This is my own writeup on feature flags; for a deep dive I'd recommend something like Martin Fowler's article (https://martinfowler.com/articles/feature-toggles.html).

So. Feature flags. The basic idea that you'll store configuration/values on a database/service somewhere, and by changing those values, you can change the user experience/features for a user on the fly.

Let's say that you're building a new feature, called 'new-button' which changes the color of buttons, which is currently red, to blue. Then you'd change code that looks like this -

bl42

import { RemoteGraphQLDataSource } from '@apollo/gateway';
import { fetch, Request, Headers } from 'apollo-server-env';
import { isObject } from '@apollo/gateway/dist/utilities/predicates';
import FormData from 'form-data';
import _ from 'lodash';

export default class FileUploadDataSource extends RemoteGraphQLDataSource {
  async process(args) {
    const { request, context } = args;

leebyron

/**
 * For compare function return:
 * - Less than zero: item1 has higher priority than item2.
 * - Zero: same.
 * - Greater than zero: item1 has lower priority than item2.
 */
export type CompareFunction<T> = (item1: T, item2: T) => number;

export class PriorityQueue<T> {
  _items: Array<T>;

tlakomy

In this talk I'd like to use 5 minutes of my time to explain to the audience why jQuery is simply way better than React.

• Does React have a fadeIn() method? Nah, I don't think so. You need to install a react-transition-group package which weighs over 3GB.
• Can you do $.get(https://stackoverflow.com/questions/12345/adding_two_numbers_javascript) in React? NOPE.
• Remember React 3.3.1? Me neither, because they didn't make it. Meanwhile in jQuery land: https://code.jquery.com/jquery-3.3.1.min.js
• Can you learn jQuery for free? Sure! Can you learn React for free? It'll be $500 USD and your left kidney for a conference ticket.

And many, many more.

(This is a completely serious lightning talk proposal, I promise.)

necolas

import createHoverMonitor from './createHoverMonitor';
import { element, func, oneOfType } from 'prop-types';
import React, { Component } from 'react';

const hover = createHoverMonitor();

/**
 * Use:
 * <Hoverable>
 *   {(hover) => <View style={hover && styles.hovered} />}

jaydenseric

GRAPHQL_URI=http://localhost:3001/graphql

lilactown

/**
 * Making promises
 */
let okPromise = Js.Promise.make((~resolve, ~reject as _) => [@bs] resolve("ok"));

/* Simpler promise creation for static values */
Js.Promise.resolve("easy");

Js.Promise.reject(Invalid_argument("too easy"));

pcarrier

function safe   { Set-Variable WhatIfPreference $true  -Scope Global };
function unsafe { Set-Variable WhatIfPreference $false -Scope Global -WhatIf:$false };

function isAdmin {
  $user = [Security.Principal.WindowsIdentity]::GetCurrent();
  (New-Object Security.Principal.WindowsPrincipal $user).IsInRole([Security.Principal.WindowsBuiltinRole]::Administrator);
}

function shell { Start-Process powershell -WorkingDirectory $PWD -ArgumentList "-NoLogo" };
function admin { Start-Process powershell -ArgumentList "-NoLogo" -Verb RunAs };

wesbos

// paste in your console
    speechSynthesis.onvoiceschanged = function() {
      var msg = new SpeechSynthesisUtterance();
      msg.voice = this.getVoices().filter(v => v.name == 'Cellos')[0];
      msg.text = Object.keys(window).join(' ');
      this.speak(msg);
    };