http://snippets.dzone.com/posts Thu, 28 Aug 2008 11:26:53 GMT DZone Snippets: cipher code http://snippets.dzone.com/posts/show/5535 Implementation <br /> <br /><code> <br /> public static string RailFenceCipher(string input){ <br /> // b.t.w we only use two rails <br /> string rail1 = ""; <br /> string rail2 = ""; <br /> char[] arry = input.ToCharArray(); <br /> bool top = true; <br /> foreach(char ch in arry){ <br /> if(top == true) <br /> rail1 += ch.ToString(); <br /> else <br /> rail2 += ch.ToString(); <br /> top = !top; <br /> } <br /> return rail1 + rail2; <br /> } <br /> public static string DeRailFenceCipher(string input){ <br /> // b.t.w we only use two rails <br /> string rail1 = input.Substring(0,input.Length / 2); <br /> string rail2 = input.Substring(input.Length / 2); <br /> int r1 = 0; <br /> int r2 = 0; <br /> string o = ""; <br /> bool top = true; <br /> while(o.Length != input.Length){ <br /> if(top == true){ <br /> o += rail1.Substring(r1, 1); <br /> r1 ++; <br /> } <br /> else{ <br /> o += rail2.Substring(r2, 1); <br /> r2 ++; <br /> } <br /> top = !top; <br /> } <br /> return o; <br /> } <br /></code> Sat, 24 May 2008 14:45:05 GMT http://snippets.dzone.com/posts/show/5535 mcr-joe (Joe Simpson) http://snippets.dzone.com/posts/show/3143 Shellscript checking if a variable is a number <br /> <br /><code> <br />#!/bin/bash <br />read VARIABLE <br />if [ $VARIABLE -eq $VARIABLE 2> /dev/null ]; then <br />echo $VARIABLE is a number <br />else <br />echo $VARIABLE is not a number <br />fi <br /></code> Wed, 13 Dec 2006 18:54:32 GMT http://snippets.dzone.com/posts/show/3143 Grzechu (Grzegorz Rumatowski)