matsadler

Ruby 2.0.0 in detail

Keyword arguments

def wrap(string, before: "<", after: ">")
  "#{before}#{string}#{after}" # no need to retrieve options from a hash
end

# optional

creaktive

# abort if already under tmux
[[ -n $TMUX_PANE ]] && return

# zsh-specific includes
zmodload -i zsh/datetime
zmodload -i zsh/stat

# place to store the chart
RAINBARF_OUT=~/.rainbarf.out
# update period, in seconds

pvdb

#
# This first version should work on Mac OS X and Linux, but it spawns a process
#
#     http://stackoverflow.com/questions/7220896/
#     https://github.com/rdp/os/blob/master/lib/os.rb#L127
#     http://www.ruby-doc.org/core-2.0/Process.html
#
# A better - but more complicated - way to achieve the same is documented here:
#
#     https://build.betterup.com/tracking-a-processs-memory-usage-in-ruby/

IanVaughan

Misc

• CTRL+Q - Turns on flow-control (if you turned it off by mistake)
• CTRL+a - increment number
• :cw - toggle quickfix list
• CTRL+E - scroll window down (cursor stays)
• CTRL+Y - scroll window up (cursor stays)
• :r - retrive (:r filename - loads file at cursor. :r !ls - loads ls at cur)

Commands

• :x - exit (with save)

zulhfreelancer

It's important to note that running this reset will drop any existing data you have in the application

How to reset PG Database on Heroku?

• Step 1: heroku restart
• Step 2: heroku pg:reset DATABASE (no need to change the DATABASE)
• Step 3: heroku run rake db:migrate
• Step 4: heroku run rake db:seed (if you have seed)

One liner

russelldb

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

joyrexus

collapsible markdown?

CLICK ME

yes, even hidden code blocks!

print("hello world!")

grodowski

#!/usr/bin/env ruby
# frozen_string_literal: true

require 'simplecov'
require 'simplecov-lcov'

puts('Merging coverage results from parallel CircleCI tests containers into a single LCOV report...')

results = []
Dir['/home/circleci/rspec/*.resultset.json'].each do |path|