michaelherold

require 'dry/monads/all'

include Dry::Monads::Result::Mixin

success = Success(:finished)

def merge(result, failures)
  result
    .or { |failure| Failure(failure + failures) }
    .bind { Failure(failures) }

michaelherold

Newton-Raphson Method in Ruby

As part of an exercise in figuring out how to derive the continuous equation that is sampled by a discrete function, I went ahead and opened my Numerical Methods textbook and started going through the Newton-Raphson Method. This, plus my first ever tweet storm are the output.

michaelherold

A benchmark comparison between DateTime and Time in Ruby.

Instructions

This uses the excellent benchmark-ips library by Evan Phoenix. You'll have to install that with:

gem install benchmark-ips

To do the Rails comparisons, you'll need to be within a Rails environment. The easiest thing would be to save the benchmark script into a Rails project, make sure benchmark-ips is in your Gemfile, and then enter a rails c environment. In the console, enter:

michaelherold

#!/usr/bin/env ruby

# gem install benchmark-ips benchmark-memory
# ruby benchmark.rb

require "benchmark/ips"
require "benchmark/memory"

Benchmark.ips do |x|
	x.report("join") do

michaelherold

Keybase proof

I hereby claim:

• I am michaelherold on github.
• I am michaeljherold (https://keybase.io/michaeljherold) on keybase.
• I have a public key ASC2imTPK_PBmFPtZknSKzIW-Dm8pqH3Bws2DiYaWE99Uwo

To claim this, I am signing this object:

michaelherold

#!/usr/bin/env ruby
hits = []

checks = {
            #'_spec\.rb$' => ['focus:[:space:]*true'],
            '\.rb$' => ['binding\.pry', 'debugger']
         }

# Find the names of all the filenames that have been (A)dded (C)opied or (M)odified
filenames = `git diff --cached --name-only --diff-filter=ACM`.split("\n")

michaelherold

# to generate your dhparam.pem file, run in the terminal
openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048

michaelherold

Unhandled rejection TypeError: Cannot read property 'toString' of null
    at defaultKey (/home/herold/code/project/node_modules/gulp-cache/index.js:17:39)
    at objectAssign._getFileKey (/home/herold/code/project/node_modules/gulp-cache/lib/TaskProxy.js:56:32)
    at objectAssign._checkForCachedValue (/home/herold/code/project/node_modules/gulp-cache/lib/TaskProxy.js:68:21)
    at objectAssign.processFile (/home/herold/code/project/node_modules/gulp-cache/lib/TaskProxy.js:24:21)
    at DestroyableTransform._transform (/home/herold/code/project/node_modules/gulp-cache/index.js:83:19)
    at DestroyableTransform.Transform._read (/home/herold/code/project/node_modules/gulp-cache/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:184:10)
    at DestroyableTransform.Transform._write (/home/herold/code/project/node_modules/gulp-cache/node_modules/through2/node_modules/readable-stream/lib/_stream_transform.js:172:12)
    at doWrite (/home/herold/code/project/node_modules/gulp-cache/node_mo

michaelherold

ruby-2.0.0 (main)> client = Twitter::REST::Client.new do |config|
  config.consumer_key = <snip>,          
  config.consumer_secret = <snip>
end
=> #<Twitter::REST::Client:0x0000000749a370>
ruby-2.0.0 (main)> tweet = client.status(381940500032258049)
=> #<Twitter::Tweet:0x00000007752770>
ruby-2.0.0 (main)> uri = Twitter::Entity::URI.new(tweet.attrs[:entities][:urls][0])
=> #<Twitter::Entity::URI:0x00000007061808>
ruby-2.0.0 (main)> uri.display_url

michaelherold

#!/bin/sh

# This amazing little snippet saved me so much time
# Sourced from http://askubuntu.com/questions/85641
sudo apt-get clean
cd /var/lib/apt
sudo mv lists lists.old
sudo mkdir -p lists/partial
sudo apt-get clean
sudo apt-get update