Improve.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3186 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

sample/occur2.rb

@@ -2,9 +2,9 @@
 # usege: ruby occur2.rb file..
 freq = {}
 while gets()
-  for word in $_.split(/\W+/)
+  for word in split(/\W+/)
     begin
-      freq[word] = freq[word] + 1
+      freq[word] += 1
     rescue NameError
       freq[word] = 1
     end

sample/pi.rb

@@ -2,7 +2,7 @@
 
 k, a, b, a1, b1 = 2, 4, 1, 12, 4
 
-while TRUE
+loop do
   # Next approximation
   p, q, k = k*k, 2*k+1, k+1
   a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1

sample/rcs.rb

@@ -8,22 +8,23 @@ w = 20.0	# distance between eyes
 h =1.0		# distance from screen and base plane
 d = 0.2		# z value unit
 ss="abcdefghijklmnopqrstuvwxyz0123456789#!$%^&*()-=\\[];'`,./"
-rnd = srand()
+rnd = srand()	# You don't actually need this in ruby - srand() is called
+		# on the first call of rand().
 
 while gets()
 #  print($_)
   xr = -hdw; y = h * 1.0; maxxl = -999
-  s = "";
+  s = ""
   while xr < hdw
     x = xr * (1 + y) - y * w / 2
     i = (x / (1 + h) + sw / 2)
-    if (1 < i && i < $_.length);
+    if (1 < i && i < $_.length)
       c = $_[i, 1].to_i
     else
       c = 0
     end
     y = h - d * c
-    xl = xr - w * y / (1 + y);
+    xl = xr - w * y / (1 + y)
     if xl < -hdw || xl >= hdw || xl <= maxxl
       tt = rand(ss.length)
       c = ss[tt, 1]
@@ -36,14 +37,3 @@ while gets()
   end
   print(s, "\n")
 end
-      
-  
-    
-  
-
-
-
-
-  
-  
-  

sample/time.rb

@@ -5,4 +5,4 @@ system(cmd)
 e = Time.now
 ut, st, cut, cst = Time.times.to_a
 total = (e - b).to_f
-printf STDERR, "%11.1f real %11.1f user %11.1f sys\n", total, cut, cst
+STDERR.printf "%11.1f real %11.1f user %11.1f sys\n", total, cut, cst

sample/trojan.rb

@@ -5,7 +5,7 @@ path = ENV['PATH'].split(File::PATH_SEPARATOR)
 for dir in path
   if File.directory?(dir)
     for f in d = Dir.open(dir)
-      fpath = dir+"/"+f  
+      fpath = File.join(dir, f)  
       if File.file?(fpath) && (File.stat(fpath).mode & 022) != 0
 	printf("file %s is writable from other users\n", fpath)
       end

sample/tsvr.rb

@@ -8,11 +8,11 @@ addr = gs.addr
 addr.shift
 printf("server is on %s\n", addr.join(":"))
 
-while TRUE
+loop do
   Thread.start(gs.accept) do |s|
     print(s, " is accepted\n")
-    while s.gets
+    while line = s.gets
-      s.write($_)
+      s.write(line)
     end
     print(s, " is gone\n")
     s.close