hagmonk

Imaging

Assuming macOS and an SD card presented as /dev/rdisk3:

For ARMv7 (Pi 2):

diskutil unmountDisk disk3
xzcat ubuntu-18.04.2-preinstalled-server-armhf+raspi2.img.xz | sudo dd of=/dev/rdisk3 bs=32m

gilrosenthal

!pip install fastai
!apt-get -qq install -y libsm6 libxext6 && pip install -q -U opencv-python
import cv2
from os import path
from wheel.pep425tags import get_abbr_impl, get_impl_ver, get_abi_tag
platform = '{}{}-{}'.format(get_abbr_impl(), get_impl_ver(), get_abi_tag())

accelerator = 'cu80' if path.exists('/opt/bin/nvidia-smi') else 'cpu'

!pip install -q http://download.pytorch.org/whl/{accelerator}/torch-0.3.0.post4-{platform}-linux_x86_64.whl torchvision

brycejohnston

Ubuntu 18.04 / 18.10 Ruby and Elixir Development Setup

Guide to setting up a new Ubuntu 18.04 dev environment with Ruby and Elixir installed with the asdf version management tool.

Update system and install prerequisite packages

Some of these packages may already be installed

sudo apt-get install make binutils gcc build-essential \
 git curl zlib1g-dev openssl libssl-dev libreadline-dev \

swlaschin

Functional Track talks from NDC Oslo 2017

Also, here is the list of all videos from NDC Oslo 2017:

• YouTube
• Vimeo

Wednesday 2017-06-14

paulirish

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

jjbubudi

DELIMITER ;;

DROP FUNCTION IF EXISTS shard_nextval;;
CREATE FUNCTION shard_nextval() RETURNS BIGINT
BEGIN
    INSERT INTO shard_seq VALUES (NULL);
    SET @R_ObjectId_val = LAST_INSERT_ID();
    DELETE FROM shard_seq;
    RETURN @R_ObjectId_val;
END;;

gigiigig

import shapeless._

import scalaz._
import Scalaz._

object console extends App {

  trait Foo[A] {
    type B
    def value: B

swlaschin

A response to http://ayende.com/blog/170849/why-ravendb-isnt-written-in-f-or-the-cost-of-the-esoteric-choice

Why my F# projects don't use RavenDB, or the cost of the esoteric choice

As you know, I generally recommend using SqlServer for data storage.

But many people have suggested that using RavenDB rather than SqlServer would dramatically reduce the development effort.

My reply to that was that using RavenDB would also lead to a lot more complexity, reduced support by other teams, harder to find DBAs and increased costs all around.

Klasu

// Simple monad to deal with multiple database transactions with same connection, their commits and rollbacks
// Something similar done in http://advorkovyy.blogspot.com.au/2010/10/transactional-monad-for-scala.html
 
import java.sql.Connection
 
trait DbTransaction[A] {
  def unit: Connection => A
  def map[B](f: A => B): DbTransaction[B] = DbTransaction {
    connection => f(unit(connection))
  }

jojobyte

Windows Registry Editor Version 5.00

[-HKEY_CLASSES_ROOT\Directory\Background\shell\Cmder]
[-HKEY_CLASSES_ROOT\Directory\shell\Cmder]