feixionglee

# '( 2 + ( ( 4 + 6 ) * (9 * 2) - ( 5 - 1)))'

class Postfix
  include Math

  def initialize expression
    @expression = expression.gsub(' ', '')
  end

  def process

feixionglee

require '/Users/lifeixiong/Desktop/postfix/postfix'
require "minitest/autorun"

class PostfixTest < Minitest::Test
  def setup
    @postfix = Postfix.new '2*(1+3)'
  end

  def test_is_digit
    assert @postfix.send :is_digit, 0

feixionglee

#!/bin/sh
 
### BEGIN INIT INFO
# Provides: unicorn
# Required-Start: $local_fs $remote_fs
# Required-Stop: $local_fs $remote_fs
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: starts unicorn
# Description: starts uniconr using start-stop-daemon

feixionglee

use the following code in a Rails initializer
 
if Rails.env.production?
  commit_hash = `git rev-parse HEAD 2>/dev/null`.to_s.strip
  APP_VERSION = Time.now.utc.strftime("%Y%m%d-%H%M-") + commit_hash[-8..-1]
else
  APP_VERSION = Time.now.utc.strftime("%Y%m%d-%H%M-development")
end

 

feixionglee

// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console

feixionglee

#!/usr/bin/env ruby

@slave_status = Hash[%x(mysql -uroot -e 'SHOW SLAVE STATUS \\\G').split(/\s*\n\s*/).map { |e| spl = e.split(/\:\s*/); spl.size == 2 ? [spl.first, spl.last] : nil }.compact]

def slave_healthy?
  @slave_status['Slave_IO_Running'] == 'Yes' &&
  @slave_status['Slave_SQL_Running'] == 'Yes' &&
  @slave_status['Seconds_Behind_Master'] != 'NULL' &&
  @slave_status['Seconds_Behind_Master'].to_i < 1800
end

feixionglee

# frozen_string_literal: true

class QuickSort
  def initialize(array)
    @array = array
  end

  def sort
    puts @array
    quick_sort(0, @array.size - 1)