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wordcount.cr
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wordcount.cr
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# Ported from http://arthurtw.github.io/2015/01/12/quick-comparison-nim-vs-rust.html
require "option_parser"
def do_work(in_filenames, output_filename, ignore_case)
if in_filenames.empty?
in_files = [STDIN]
else
in_files = in_filenames.map { |name| File.open(name, "r") }
end
if output_filename
out_file = File.open(output_filename, "w")
else
out_file = STDOUT
end
counts = Hash(String, Int32).new(0)
in_files.each do |in_file|
in_file.each_line do |line|
line = line.downcase if ignore_case
line.scan(/\w+/) do |match|
counts[match[0]] += 1
end
end
end
entries = counts.to_a.sort_by! &.[0]
entries.each do |(word, count)|
out_file.puts "#{count}\t#{word}"
end
end
output_filename = nil
ignore_case = false
OptionParser.parse do |opts|
opts.banner = "Usage: wordcount [OPTIONS] [FILES]"
opts.on("-o NAME", "set output filename") do |filename|
output_filename = filename
end
opts.on("-i", "--ignore-case", "ignore case") do
ignore_case = true
end
opts.on("-h", "--help", "print this help menu") do
puts opts
end
end
in_filenames = ARGV
do_work in_filenames, output_filename, ignore_case