class Analyzer

Attributes

num_array[RW]

Public Class Methods

new(num_array) click to toggle source

# File lib/analyzer.rb, line 5
def initialize(num_array)
  self.num_array = num_array
end

Public Instance Methods

mean() click to toggle source

# File lib/analyzer.rb, line 9
def mean
  self.num_array.inject(&:+)/num_array.count
      # [a, b, c].inject(&:+) # =>  ((a + b)+ c)+ d)
      # [b, c, d].inject(a, &:+) # =>  ((a + b)+ c)+ d)
end

median() click to toggle source

# File lib/analyzer.rb, line 15
def median
  sorted = self.num_array.sort!
  sorted[sorted.count/2]
end

mode() click to toggle source

# File lib/analyzer.rb, line 20
def mode
  freq = self.num_array.inject(Hash.new(0)) { |h,v| h[v] += 1; h }
  self.num_array.max_by { |v| freq[v] }
end

print_calculations() click to toggle source

# File lib/analyzer.rb, line 25
def print_calculations
  puts "Analysis complete, based on #{num_array.length} craigslist listings!"
  puts "The mean price for your search is #{mean}"
  puts "The median price for your search is #{median}"
  puts "The mode price for your search is #{mode}"
end