kjlape

Keybase proof

I hereby claim:

• I am pingortle on github.
• I am pingortle (https://keybase.io/pingortle) on keybase.
• I have a public key ASDdzMBjB_KEboIXEmrJvAuon9g6lIZR3Z0KREwT5svJUAo

To claim this, I am signing this object:

kjlape

# Given #1: a list of ids in a specific order you want to preserve
ordered_ids = (1..3).to_a.reverse
#=> [3, 2, 1]
indexed_ids = ordered_ids.each_with_index.to_h
#=> {3=>0, 2=>1, 1=>2}

# Given #2: a collection of items with the same ids as in the list above, but in no particular order
#   Example: `Model.where(…)` in rails
Model = Struct.new(:id, :name)
items = (1..3).map { |id| Model.new(id, "Item #{id}") }

kjlape

module ActiveJobListeningToErrors
  extend ActiveSupport::Concern

  module ClassMethods
    def on_error(error_class)
      around_perform do |job, perform_block|
        perform_block.call
      rescue error_class => error
        yield job, error
        raise

kjlape

The behavior of enqueue.active_job changed slightly between Rails 5.2 and 6.0. In 5.2 the event doesn't fire if there's an error queuing the job. In 6.0 it always fires regardless of error.

Relevant rails code is…

• Rails 5.2: https://github.com/rails/rails/blob/6-0-stable/activejob/lib/active_job/logging.rb#L35
• Rails 6.0: https://github.com/rails/rails/blob/6-0-stable/activejob/lib/active_job/logging.rb#L35

One more interesting difference between 5.2 and 6.0 here is that 5.2 did not include timing information since it fires in an after_enqueue. In 6.0 it has moved to around_enqueue and passes the block to be instrumented.

kjlape

if Gem::Version.new("2.6") <= Gem::Version.new(RUBY_VERSION)
  def compose(*funcs)
    funcs.map(&:to_proc).reduce(:<<)
  end
else
  def compose(*funcs)
    funcs.map(&:to_proc).reduce { |f, g| ->(*x) { f.call(g.call(*x)) } }
  end
end

kjlape

require "benchmark"
require "test/unit/assertions"

extend Test::Unit::Assertions

text = <<END

here's some
text for
you

kjlape

#!/bin/sh -e

# A simple script to keep a tidy ~/code directory organized by owner & then repo
# When the script is done, just hit command-v to switch into the directory
# (Github and Mac only. Sorry, openness!)
#
# Usage:
#   gloan <org>/<repo>
# Or:
#   gloan <org> <repo>

kjlape

#!/bin/bash
set -e

# Install brew
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

brew update

brew install rbenv

kjlape

# navigate to the boot partition
# set WPA_SSID and WPA_PSK

touch ssh

cat > wpa_supplicant.conf <<EOF
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=US

kjlape

function Node(data, { left, right } = {}) {
  this.data = data
  this._left = left || this,
  this._right = right || this
}

Node.prototype = {
  left,
  right,
  insertLeft,