sanchezzzhak

SELECT table,
    formatReadableSize(sum(bytes)) as size,
    min(min_date) as min_date,
    max(max_date) as max_date
    FROM system.parts
    WHERE active
GROUP BY table

mrlesmithjr

---
- name: Install MacOS Packages
  hosts: localhost
  become: false
  vars:
    brew_cask_packages:
      - atom
      - docker
      - dropbox
      - firefox

rueycheng

GNU Make Cheatsheet

Based on https://www.gnu.org/software/make/manual/html_node/Quick-Reference.html

Directives

Directive	Description
define variable define variable = define variable := define variable ::= define variable += define variable ?= endef	Define multi-line variables.
undefine variable	Undefining variables.

elalemanyo

Debug zsh startup time

1. Inject profiling code

   At the beginning of your .zshrc add following: zmodload zsh/zprof

   and at the end add: zprof

   This will load zprof mod and display what your shell was doing durung your initialization.

yoyama

/**
  * Generate Case class from DataFrame.schema
  *
  *  val df:DataFrame = ...
  *
  *  val s2cc = new Schema2CaseClass
  *  import s2cc.implicit._
  *
  *  println(s2cc.schemaToCaseClass(df.schema, "MyClass"))
  *

sean-perryman

#!/bin/bash
#
# MicroStack by Canonical - Helper Install Script
# 
# This script installs the MicroStack snap and setups up the networking fix developed by Rodrigo Nascimento
# 
# Original blog post available here: https://connection.rnascimento.com/2021/03/08/openstack-single-node-microstack/
#
# Note: Make sure you adjust the INTERFACE and IP_ADDRESS variables to your environment. 
# If you make the IP_ADDRESS the same as your current address you won't lose connection. 

expelledboy

#!/bin/bash

# !!WARNING!!
# This will DELETE all efforts you have put into configuring nix
# Have a look through everything that gets deleted / copied over

nix-env -e '.*'

rm -rf $HOME/.nix-*
rm -rf $HOME/.config/nixpkgs

lordofthelake

# Eclipse
.classpath
.project
.settings/
 
# Intellij
.idea/
*.iml
*.iws
 

VladUreche

# Scaladoc Developer Guide
## Introduction
Scaladoc is the tool that enables developers to automatically generate documentation for their Scala (and Java) projects. It is Scala's equivalent of the widely-used Javadoc tool. This means that Javadoc (and even doxygen) users will be familiar with Scaladoc from day 1: for them, it is most beneficial to check out the Scaladoc/Javadoc comparison tables and if necessary, skim through this document to understand specific features. 

The rest of this tutorial is aimed at developers new to Scaladoc and other similar tools. It assumes a basic understanding of the Scala language, which is necessary to follow the examples given throughout the tutorial. For the user perspective on the Scaladoc-generated documentation, such as finding a class, understanding the page layout, navigating through diagrams, please refer to the Scaladoc User Guide.

The tutorial will start by a short motivation and then will explain the main concept in Scaladoc: the doc comment.

### Why document?

kmader

Serialization

As all objects must be Serializable to be used as part of RDD operations in Spark, it can be difficult to work with libraries which do not implement these featuers.

Java Solutions

Simple Classes

For simple classes, it is easiest to make a wrapper interface that extends Serializable. This means that even though UnserializableObject cannot be serialized we can pass in the following object without any issue

public interface UnserializableWrapper extends Serializable {
 public UnserializableObject create(String parm1, String parm2);