1 files changed, 5 insertions, 11 deletions
diff --git a/stddev b/stddev
index 3bf0270..891c4c9 100755
--- a/stddev
+++ b/stddev
@@ -3,22 +3,16 @@
 require 'trollop'
 
 
-def usage
-  STDERR.write "./stddev [-r <d>] < <one number per line>\n"
-  exit 1
-end
-usage if not [0,2].include? ARGV.size
-
-opts = Trollop::options do
+cfg = Trollop::options do
+  banner "stddev [-r <d>] < <one number per line>"
   opt :round, "Number of digits after decimal point.", :type => :int, :default => -1
 end
 
-
 sum = 0.0
 i = 0
 cached = []
 while line=STDIN.gets
-  v = line.strip.to_f
+  v = line.to_f
   sum += v
   cached << v
   i +=1
@@ -33,8 +27,8 @@ cached.each { |v|
 
 stddev = Math.sqrt(var)
 
-if opts[:round] >= 0
-  puts stddev.round opts[:round]
+if cfg[:round] >= 0
+  puts stddev.round cfg[:round]
 else
   puts stddev
 end