word_histogram.rb

# Creates a little histogram of the frequency of words occuring in your string
# Usage : ruby word_histogram.rb "Test string, string"

a=(ARGV[0].split(/[^\w]/).inject(Hash.new(0)){|h,x|h[x.downcase]+=1;h;}.delete_if{|k,v|k==""}.sort_by{|k,v| k.length}.reverse);a.map{|k,v|puts "=> #{k} ".ljust(a.first[0].size+4)+'*'*v+"\n"}