taq

#!/bin/bash
 
if ! which md5sum > /dev/null; then
	echo Install md5sum
	exit 1
fi
 
if ! which curl > /dev/null; then
	echo Install curl
	exit 1

taq

require "minitest/autorun"
require "minitest/spec"
require "spreadsheet"

describe 'spreadsheet' do
  def self.before_all
    @doc ||= Spreadsheet.open "spreadsheet.xls"
  end

  before do

taq

# First parameter is a bash printf formatting string
# From second till fifth parameter, rvm-prompt format parameters
__ruby_ps1 () {
   if [ ! -f ./Rakefile ] &&
      [ "$(find -maxdepth 1 -name '*.rb' | head -n1)" == "" ]; then
      exit 1
   fi
   if [ -f ~/.rvm/bin/rvm-prompt ]; then 
      rst=$(~/.rvm/bin/rvm-prompt $2 $3 $4 $5)
   fi

taq

require "benchmark"
include Benchmark

values = (0..1000).to_a

bm(10) do |bench|
   bench.report("regular") do
      values.map { |x| x * 10 }.select { |x| x > 30 } 
   end
   bench.report("lazy") do

taq

regexp = /^([A-Z])?[a-z]+(?(1)[A-Z]|[a-z])$/

p regexp =~ "foo"   #=> 0
p regexp =~ "foO"   #=> nil
p regexp =~ "FoO"   #=> 0

taq

class C
   def x; "x"; end
end

module M
   def x; '[' + super + ']'; end
   def y; "y"; end
end

class C

taq

def foo(str: "foo", num: 123456)
  [str, num]
end

p foo(str: 'buz', num: 9) #=> ['buz', 9]
p foo(str: 'bar') # => ['bar', 123456]
p foo(num: 123) # => ['foo', 123]
p foo # => ['foo', 123456]
p foo(bar: 'buz') # => ArgumentError

taq

p [:ruby, :"2.0", :symbol, :array, :literal]
#=> [:ruby, :"2.0", :symbol, :array, :literal]
p %i(ruby 2.0 symbol array literal)
#=> [:ruby, :"2.0", :symbol, :array, :literal]

taq

natural_numbers = Enumerator.new do |yielder|
  number = 1
  loop do
    yielder.yield number
    number += 1
  end
end

p natural_numbers.select { |n| n.odd? }.take(5).to_a 

taq

module TimeExtensions
  refine Fixnum do
    def minutes; self * 60; end
  end
end

class MyApp
  using TimeExtensions
  def initialize
    p 2.minutes