rickhull

vagrant@contrib-jessie:~/git/mruby (master)$ echo $MRUBY_CONFIG
/home/vagrant/mruby/build_config.rb

vagrant@contrib-jessie:~/git/mruby (master)$ cat $MRUBY_CONFIG
puts "\n" * 20
puts "HELLO WORLD"
puts "\n" * 5

MRuby::Build.new do |conf|
  toolchain :gcc

rickhull

$ chruby mruby
trace:
        [0] -:1
-:1:undefined method 'defined?' for main (NoMethodError)
$

rickhull

require 'benchmark/ips'

def new_hash
  { foo: :bar, baz: :quux }
end

immutable = new_hash

Benchmark.ips do |b|
  b.config time: 3, warmup: 0.5

rickhull

vagrant@contrib-jessie:~$ cd btest
vagrant@contrib-jessie:~/btest$ mkdir -p foo/bar/baz
vagrant@contrib-jessie:~/btest$ cd foo
vagrant@contrib-jessie:~/btest/foo$ echo "puts :hello_world" > test.rb
vagrant@contrib-jessie:~/btest/foo$ ruby test.rb
hello_world
vagrant@contrib-jessie:~/btest/foo$ bundle exec ruby test.rb
Could not locate Gemfile or .bundle/ directory
vagrant@contrib-jessie:~/btest/foo$ touch Gemfile
vagrant@contrib-jessie:~/btest/foo$ bundle exec ruby test.rb

rickhull

# frozen_string_literal: true
require 'rake/task'
require 'digest'

module Rake
  class ChecksumTask < Task
    # satisfying an API here; scope is purposely ignored
    def self.scope_name(_scope, task_name)
      Rake.from_pathname(task_name)
    end

rickhull

require 'rake'
require 'benchmark/ips'

existing = Dir['**/*']
puts "known existing files: #{existing.size}"

nonexist = existing.map { [rand(9**9), rand(9**9)].join('.') }

def old_timestamp(name)
  if File.exist?(name)

rickhull

[4.999999999999999, 5]
[9.999999999999998, 10]
[3.0000000000000004, 3]
[6.000000000000001, 6]
[3.0000000000000004, 3]
[6.000000000000001, 6]
[11.000000000000002, 11]
[5.000000000000001, 5]
[10.000000000000002, 10]
[7.000000000000001, 7]

rickhull

    # Open one end of named pipe
    # @argument pipe_path - path to fifo
    # @argument flag - [r, w, w+, ...
    # @argument wait_on_str - continue if can read]
    # @returns named_pipe -handle
    def named_pipe( pipe_path, flag, wait_on_str=nil )
      if File.exists? pipe_path
        raise "bad #{pipe_path}" unless File.pipe? pipe_path
      end
      pipe_handle = File.mkfifo pipe_path

rickhull

require 'socket'
require 'thread'

host = ARGV.shift || 'localhost'
port = ARGV.shift || 9999
num_sockets = ARGV.shift || 9999

words = %w{lorem ipsum dolor sit amet consectetur adipiscing elit sed do eiusmod tempor incididunt ut labore et dolore magna aliqua}

sockets = Array.new(num_sockets.to_i) { TCPSocket.new(host, port.to_i) }

rickhull

irb(main):027:0> xs
=> [1, 10, 100, 1000]
irb(main):028:0> ys = xs.map { |x| x**3 }
=> [1, 1000, 1000000, 1000000000]
irb(main):029:0> Fit.linear(xs, ys)
=> [-35636508, 1029295, 0.9916277794417635]