Add a randomize-lines that uses stronger randomness than sort -R

1 files changed, 40 insertions, 0 deletions

diff --git a/rl b/rl
new file mode 100755
index 0000000..7f36068
--- /dev/null
+++ b/rl
@@ -0,0 +1,40 @@
+#!/usr/bin/python
+
+# Ramdomize the lines from stdin.
+#
+# Uses a stronger source of entropy, so you don't end up with repeated output
+# (or at least repeated starts# so often as with sort -R or
+#  perl -MList::Util # -e 'print List::Util::shuffle <>'
+#
+
+# Copyright (c) 2015 Peter Palfrader <peter@palfrader.org>
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
+import random
+import sys
+
+lines = sys.stdin.readlines()
+
+random.SystemRandom().shuffle(lines)
+
+for l in lines:
+  print l,