libkazz

# Check JAN(Japanse Area Number) is valid or not
class JanCheck
  def self.valid?(number)
    new(number).valid?
  end

  attr_reader :number

  def initialize(number)
    @number = number.to_s

libkazz

sudo netstat -ntulp | grep -v '127.0.0.1:' | egrep '(tcp|udp)' | ruby -anle 'print $_ + "\t" + open("/proc/#{$_.match(/ (\d+)\//)[1]}/cmdline", "r").gets'

libkazz

# Usage:
#   Book.new('foo.ods').sheet('first sheet').each do |row|
#     puts "first column => " + row["first column"]
#     puts "second column => " + row["second column"]
#   end
#
# Write gem 'roo' at Gemfile
module Foo
  class Book
    def initialize(file)

libkazz

class AddColumnIdToLogs < ActiveRecord::Migration
  def up
    add_column :logs, :id, :integer, null: false # FIXME: Add column to head of columns

    execute 'SET @rownum = 0'
    execute 'UPDATE `access_logs` SET `id` = @rownum := @rownum + 1'
    execute 'ALTER TABLE `logs` ADD PRIMARY KEY(`id`, `date`)'   # Partitioning key () must be primary key.
    execute 'ALTER TABLE `logs` CHANGE `id` id INT(11) AUTO_INCREMENT'
  end

libkazz

vals = {
  type: ['wood','iron','other'],
  length: [1,2,3,4,5],
  width: [1,2,3],
}

class Hash
  def combination
    keys.reduce([{}]) do |r, key|
      r = _add_to_combination(r, key)

libkazz

gzcat tmp/sitemaps/sitemap.xml.gz | ruby -rnokogiri -e 'Nokogiri::XML($stdin.read).search("url/loc").each {|n| puts n.text }'

libkazz

since = '2016/3/22'
path = 'app/assets/stylesheets'

`git log --pretty="format:%ad %h" --date=short --since="#{since}" #{path}`.split("\n").reverse.each do |line|
  date, rev = line.split
  system("git checkout #{rev} 2> /dev/null")
  count = `find #{path} -type f -exec wc -l {} \\; | awk '{n+=$1} END{print n}'`.chomp.to_i
  puts [date, rev, count].join(',')
end

libkazz

class StoneTori
  class Stones
    def initialize(count)
      @count = count
    end

    def empty?
      @count.zero?
    end

libkazz

Moving from jQuery

Events

// jQuery
$(document).ready(function() {
  // code
})

libkazz

console.log('Loaded..');

class Togglable {
  constructor(th) {
    this.th = th;
    this.table = th.parentNode.parentNode.parentNode;
    this.tds = this.table.querySelectorAll('td:nth-child(' + this._getColumnIndex(th) + ')')
  }

  toggle() {