# I was just at a job interview and was asked to write a function that did
a frequency of various words from a string.
# I wrote something out on the board similar to my freq() method below.
When I got home I coded this example up as
# an exercise
#
# I was then asked how could I improve the efficiency of the function. My
guess is it would need to involve multi processing ?
# multi threading would not help I don't think. Offhand I wasn't sure how
to answer the question. Multi processing via fork is
# not easy because the freq has to be combined at the end. That seems to
have been the best answer but how to do it in
# my simple function I don't know ..
#
# they also asked what is the complexity which I forget that stuff as once
in a while I review it, but then within a few months I forget it again and
# I have many areas I am trying to study ..
#
#
require 'benchmark'
class FreqTest
attr_reader :data_str
def initialize
gen_data
end
def freq
map = {}
tokens = @data_str.scan(/\w+/)
tokens.each do |tok|
map[tok] ||= 0
map[tok] += 1
end
map
end
private
def gen_data
parts = %w(ze pu ke no zi al loo kuna zetch pe def tuna kaga)
@data_str = ""
loop_cnt = rand(100000) + 100
loop_cnt.times do
str = ""
(rand(4) + 1).times{str << parts[rand(parts.length)]}
# puts "<" + str + ">"
@data_str << str + " "
end
end
end
ftest = FreqTest.new
puts ftest.data_str
puts Benchmark.measure{
ftest.freq
}
--
You received this message because you are subscribed to the Google Groups "Ruby
on Rails: Talk" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to rubyonrails-talk+unsubscr...@googlegroups.com.
To post to this group, send email to rubyonrails-talk@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/rubyonrails-talk/fa8f97a6-900a-4246-b178-d1ed90b03e3f%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
