7 languages Ruby Day 2

day2_index_each.rb

array2 = []
16.times{array2 << rand(100)}
[0,1,2,3].each{|index| 4.times{print array2[index], " ";index+=4};print "\n"}

day_2_simple_grep.rb

def simple_grep file, pattern
  File.open(file, "r") do |file|
    while x = file.gets
      puts x if x.match(pattern) 
    end
  end
end

simple_grep ARGV[0], ARGV[1]

day_2_tree_class.rb

class Tree
  attr_accessor :children, :node_name
  def initialize opts
    @node_name = opts.keys.first
    @children = []
    opts[@node_name].each{|k,v| x = {k=>v}; @children << Tree.new(x) }
  end

  def visit_all &block
    visit &block
    @children.each{|c| c.visit_all &block}
  end

  def visit &block
    block.call self
  end
end