suryart

# !/usr/bin/ruby1.9.2
# encoding: utf-8
class Node
  attr_accessor :src, :dst, :length
  
  def initialize(src, dst, length = 1)
    @src = src
    @dst = dst
    @length = length
  end

suryart

#!/usr/bin/ruby
require 'benchmark'
str2 = "My another testing well string"
n = 500
Benchmark.bm(40) do |x|
  x.report("str2[/(.*)\s/,1]                  "){ n.times { str2[/(.*)\s/,1] } }
  x.report("str2[0...str2.rindex(' ')]        "){ n.times { str2[0...str2.rindex(' ')] } }
  x.report("str2.split(' ')[0...-1].join(' ') "){ n.times { str2.split(' ')[0...-1].join(' ') } }
  x.report("str2[/.*(?=\s)/]                  "){ n.times { str2[/.*(?=\s)/] } }
end

suryart

arr = [1, 2, 4, 10, 90, 302, 312, 500]

(2..arr.count).each do |len|
  arr.combination(len).each do |comb|
    sum = comb.inject(:+)
    if arr.include? sum
      puts (comb << sum).inspect
    end
  end
end

suryart

require 'benchmark'

string = 'dskjkd'
n = 500000
Benchmark.bm(40) do |x|
  x.report("string.size    "){ n.times { string.size } }
  x.report("string.length  "){ n.times { string.length } }
end

suryart

require 'benchmark'

def my_method
  string = 'dskjkd'
  chars = string.split('')
  counts = chars.count
  (2..chars.count).each do |len|
    chars.combination(len).each do |comb|
      string = comb.inject(:<<)
      counts += 1 if string.reverse == string

suryart

module InstanceModule
  def track
    "Tracking todo: #{self.name}" 
  end
end

module ClassModule

  def class_name
    "Tracking class: #{self.name}"

suryart

def is_prime?(num)
    return false if num <= 1
    2.upto(Math.sqrt(num).to_i) do |x|
      return false if num%x == 0
    end 
    true
end 

suryart

Implementation of flatten method of Array#flatten

Requires Ruby 1.9.2 or above. This implementation adds Array#my_flatten to an Array object, which is itself a replica of Array#flatten which is done in C.

Run test

Make sure you have minitest gem installed: $ gem install minitest. Then run:

ruby my_flatten_test.rb

suryart

// Just empty macbook.local.err file then restart the server
rm /usr/local/var/mysql/macbook.local.err
mysql.server start

suryart

class BinaryTreeNode
  attr_accessor :left, :right, :data
  def initialize(data)
    @data = data
  end
end


class TreeQueue