patrickward

Adaptive Widgets for Flutter

Built-in adaptive widgets

Flutter has several widgets that have built-in adaptive features showing a styled widget that adapts to the currently platform (Cupertino or Material).

Icons

Icon(

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Steps to get started with Expo, Typescript, ESLint and Prettier

The first step is to use the Expo CLI to initialize the project. If you don't have the latest version of the Expo CLI tool, (or you don't have it installed) run npm install -g expo-cli.

Now run the following commands in the same order:

• expo init my-app -t expo-template-blank-typescript
• npx install-peerdeps --dev eslint-config-airbnb
• npm i --save-dev @typescript-eslint/parser @typescript-eslint/eslint-plugin
• npm i --save-dev prettier eslint-config-prettier eslint-plugin-prettier

Create or edit the file .eslintrc.json with the following content:

patrickward

Sourced from: https://medium.com/swlh/user-story-template-with-examples-244528bf9e7

Title: Returns and exchanges go to inventory.

Story
-----
As a store owner,
I want to add items back to inventory when they are returned or exchanged,
so that I can track inventory.

patrickward

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

patrickward

patrickward

---
# ^^^ YAML documents must begin with the document separator "---"
#
#### Example docblock, I like to put a descriptive comment at the top of my 
#### playbooks.
#
# Overview: Playbook to bootstrap a new host for configuration management.
# Applies to: production
# Description: 
#   Ensures that a host is configured for management with Ansible.

patrickward

;; Batch processes all files within the current directory 
;; by running a selective blur on each image and then saving them
;; WARNING: edits the original file. Run this on copies of the original images. 
;; 
;; Save the script below in the local gimp scripts directory 
;; (e.g. ~/.gimp-2.8/scripts/batch-selective-blur.scm)
;; 
;; Example execution: 
;; gimp -i -b '(batch-selective-blur "*.jpg" 6.0 31)' -b '(gimp-quit 0)'
;; 

patrickward

avconv -i inbound.mp4 -vsync 1 -r 0.1 -an -y 'outbound-folder/video-clip-%4d.jpg'

patrickward

I'm a fan of MiniTest::Spec. It strikes a nice balance between the simplicity of TestUnit and the readable syntax of RSpec. When I first switched from RSpec to MiniTest::Spec, one thing I was worried I would miss was the ability to add matchers. (A note in terminology: "matchers" in MiniTest::Spec refer to something completely different than "matchers" in RSpec. I won't get into it, but from now on, let's use the proper term: "expectations").

Understanding MiniTest::Expectations

Let's take a look in the code (I'm specifically referring to the gem, not the standard library that's built into Ruby 1.9):

# minitest/spec.rb

module MiniTest::Expectations

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require 'guard/willow'

config  = @global_config
options = Willow.configure(config)
paths   = options[:paths]
source  =  File.expand_path(options[:source])

guardfile = <<-EOS
guard 'willow', :source => '#{source}' do
  watch(%r{^#{paths[:assets]}/.*})