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Find the number of calls in Ruby code that have happened no times, just once, or many times.
require 'set'
require 'find'
class Array
def to_h; Hash[self]; end
def to_set; Set.new(self); end
def freq; group_by {|e| e }.map {|k,v| [k,v.count] }.to_h; end
end
all_words =
Find.find(File.expand_path(ARGV[0]))
.grep(/\.rb$/)
.reject {|fn| fn =~ /_spec\.rb$/ }
.map {|fn| IO.read(fn).scan(/\w+/) }
.flatten
method_set =
all_words.each_cons(2)
.select {|fst,_| fst == "def" }
.map {|_,method_name| method_name }
.to_set
non_decl_names =
all_words.each_cons(2)
.reject {|fst,_| fst == "def" }
.map {|_,name| name }
freqs =
non_decl_names.select {|t| method_set.include?(t) }
.freq
.values
.freq
zeros = (method_set.to_a - non_decl_names.uniq).count
ones = freqs[1]
manys = freqs.values.reduce(:+) - ones
percentage = ones / (ones.to_f + manys) * 100.0
puts "zeros: #{zeros}\nones: #{ones}\nmanys: #{manys}\npercentage: #{percentage}"
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