Icelandjack

• Continued in Explicit Witnesses of Monoid Actions, Semigroup / Monoid / Applicative homomorphisms

Reddit discussion

My initial motivation for -XDerivingVia was deriving across isomorphisms.

Standard type-class encodings of isos turn out to be awkward due to overlap.

aurelkurtula

import ReactDOM from 'react-dom';
import React, { Component } from 'react';    
import { Provider, connect } from 'react-redux';
import { createStore, compose  } from 'redux';

const todos =  (state = [], action) => {
  switch (action.type) {
    case 'CREATE_TODO':
    return state.concat([action.text])
    default:

busypeoples

Back To The Basics

Chapter 2: Using Flow

Introduction

Why does it make sense to use FlowType or TypeScript when working with JavaScript? To give an appropriate answer, the best idea would be to build a small game or application to make the benefits clear.

albertico

#!/usr/bin/env ruby

require 'mail'

Mail.defaults do
  delivery_method :smtp, { :address   => "email-smtp.us-east-1.amazonaws.com",
                           :port      => 587,
                           :user_name => "YOUR_IAM_SMTP_USER_FOR_SES",
                           :password  => "YOUR_VERY_LONG_PASSWORD",
                           :authentication => 'plain',

AimeeKnight

• Gecko Reflow Visualization
• css-stacking-contexts-wtf
• critical-rendering-path
• why-do-browsers-match-css-selectors-from-right-to-left
• getting-started-with-the-webkit-layout-code
• improving-css-performance-fixed-position-elements
• BlinkOn 5: Paint and Compositing Deep Dive
• a-quick-overview-of-chromes-rendering-path
• [render-blocking-css](https://developers.google.com/web/fundamentals/performance/critical-rendering-path/render-b

zhongfox

module DataService
  RELATION_ID = 'relation'

  module DataApi
    def self.included base
      base.singleton_class.send :attr_accessor, # private method
        :json_attributes,                       # 数据模型的json属性定义
        :expire_time,                           # 数据模型的过期时间
        :model_class,                           # 数据模型对应的Activerecord, 默认值是根据类名推断, 可以在这里覆盖
        :cache_key                              # 缓存的key, 有默认值, 通常不需要设置

benschwarz

Apps

• Postico client for mac
• pgcli - Postgres CLI with autocompletion and syntax highlighting
• pghero - Server and query performance dashboard

Tools

• PEV - Query planning / Explain analyze visualisation
• PostgreSQL's explain analyze made readable

antirez

require 'redis'
Chars=('A'..'Z').to_a

def g(prefix)
    choice = rand(9)
    if (choice == 0)
        # Values around this size stress the cascading update.
        len = [252,250].shuffle.first
        prefix += rand(1000000).to_s
        string = prefix + ("A"*(len-prefix.length))

derwiki

# More information available at https://www.owasp.org/index.php/Blind_SQL_Injection
POSITIVE_DELAY = 2

CHARS = ('A'..'Z').to_a + ('a'..'z').to_a + ('0'..'9').to_a

def query(table, field, id, char, pos)
  %Q[SELECT CASE WHEN substr(#{field}, #{pos}, 1) = \'#{char}\' THEN pg_sleep(#{POSITIVE_DELAY}) ELSE NULL END FROM #{table} WHERE id = #{id} ;]
end

def timeit

alexkrolick

const CDN = process.env['CDN_HOST'] || '';

/**
 * Webpack configuration for integrating Webpack with Rails via the webpack-rails gem 
 * (https://github.com/mipearson/webpack-rails)
 * 
 * Cache-Busting Strategy:
 *   Development: Change query string of resource when content MD5 hash changes, 
 *                rewriting the asset in place but triggering rewrite of the manifest.
 *   Production:  Use MD5 hash of asset as filename, writing new assets and manifest