straybro

<?php
/**
 * @author Simon Holywell <treffynnon@php.net>
 */
class LazyLoadingProxy {
    /**
     * Where the instance of the actual class is stored.
     * @var $instance object
     */
    private $instance = null;

straybro

(ns little-schemer.benchmark
  "Benchmarking the function C of the Collatz Conjencture:

  http://en.wikipedia.org/wiki/Collatz_conjecture

  in regular Clojure (C*) and as it is defined in the book The Little Schemer,
  where all of the parts are defined recursively in terms of add1 and sub1."
  (:gen-class)
  (:refer-clojure :exclude [even?])
  (:require [criterium.core :refer [quick-bench]]))

straybro

Applied Functional Programming with Scala - Notes

Copyright © 2016-2018 Fantasyland Institute of Learning. All rights reserved.

1. Mastering Functions

A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.

val square : Int => Int = x => x * x

straybro

Why objects (usually) use less memory than arrays in PHP

This is just a small post in response to [this tweet][tweet] by Julien Pauli (who by the way is the release manager for PHP 5.5). In the tweet he claims that objects use more memory than arrays in PHP. Even though it can be like that, it's not true in most cases. (Note: This only applies to PHP 5.4 or newer.)

The reason why it's easy to assume that objects are larger than arrays is because objects can be seen as an array of properties and a bit of additional information (like the class it belongs to). And as array + additional info > array it obviously follows that objects are larger. The thing is that in most cases PHP can optimize the array part of it away. So how does that work?

The key here is that objects usually have a predefined set of keys, whereas arrays don't:

straybro

Conventinal Commit Messages

See how a minor change to your commit message style can make a difference. Examples

Have a look at CLI util git-conventional-commits to ensure this conventions and generate changelogs

Commit Formats

Default

straybro

There are 3 plugins for generating to create a JAR-File in maven:

• maven-jar-plugin
• maven-assembly-plugin
• maven-shade-plugin

maven-jar-plugin:This plugin provides the capability to build and sign jars.But it just compiles the java files under src/main/java and /src/main/resources/.It doesn't include the dependencies JAR files.

<!--exclude all xml files from the jar-->
<plugin>
    <groupId>org.apache.maven.plugins</groupId>

straybro

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

straybro

Fluent-bit rocks

A short survey of log collection options and why you picked the wrong one. 😜

Who am I? Where am I from?

I'm Steve Coffman and I work at Ithaka. We do JStor (academic journals) and other stuff. How big is it?

Number	what it means
101,332,633	unique visitors in 2017

straybro

Badoo Tech Blog: https://tech.badoo.com/ru/

Performance in general

Double VS single quotes: https://habr.com/ru/company/alfa/blog/447416/

Monitoring

Hardware

straybro

type JSONContainer struct {
	data []interface{}
}

func (j *JSONContainer) All() (objects []JSONObject) {
	for _, v := range j.data {
    objects = append(objects, JSONObject{data: v})
	}
	return
}