Mixture (Sanskrit - मिश्रण) of Interesting Topics

Regular Expressions are mainly used for pattern matching i.e. mostly UI level validations like E-mail-Id, password, number-field validations, etc., and are language independent, concise and really interesting (when they are tough to form). I am not going to tell you how to form or use regular expression (also known as regex) as there are many really good websites available out there like - http://www.regular-expressions.info http://regexlib.com/ http://coding.smashingmagazine.com/2009/06/01/essential-guide-to-regular-expressions-tools-tutorials-and-resources/ How to use :- In Javascript, to search a pattern in a string variable, use - var stringToMatch = "this is my pattern"; if(stringToMatch.search(/pattern/i)!= -1) alert("Pattern matched."); else alert("Pattern not matched."); OR in java, make use of  java.util.regex.Pattern and  java.util.regex.Matcher OR simply String class's methods matches(), replaceAll() and split(). Fo...

***Getting All ChildNodes (including at all levels of a TreeNode) in ExtJS*** Hi friends, Here is a function which I had written to get all children of a TreeNode i.e. Both immediate (can also be obtained from TreeNode. childNodes ) and all innerNodes (grand, grand-grand, etc.) till leaf-level i.e. till the end all the nodes. As said, With TreeNode's property "childNodes" we get only first level child nodes array. Consider if you want array of all the nodes under the given node, then following function will help you. /** * Following Function recurses through all nodes under the given node, * and return an Array of AsyncTreeNode objects (containing itself) * (Note - If the given Object is not desired in returned array can be easily * removed, using splice/slice methods of JS Array methods) */ getDeepAllChildNodes = function(node){ var allNodes = new Array(); if(!Ext.value(node,false)){ return []; } ...

Here is one excellent instrumental, I think its a mix of the famous "Hotel California" by Eagles and Pehla Nasha (Hindi) from Jo Jeeta Wohi Sikandar... by the way...music is awesome and video rocks... Now watch these two videos too... The Excellent Hotel California Instrumental - Here is original - Hotel California Video - And Pehla Nasha (Hindi) Video - 

"Software as a service" is a software delivery model wherein vendors hosts their software/application centrally and generally clients can access it through thin-clients and most-of-the-times just web-browser-based over internet. Recently I had to give a presentation on SaaS, so here it is, in the form of screen-shots - The Resources which helped me to understand the concept and prepare this presentation are - 1) MSDN Articles on SaaS and Multi-tenancy - the best source about SaaS-information       http://msdn.microsoft.com/en-us/library/aa479086.aspx 2)  http://www.developerforce.com/search/search.php?q=multitenancy 3)  http://www.sapiensoftware.com/multitenant.aspx 4)  https://en.wikipedia.org/wiki/Multitenancy 5)  http://iablog.sybase.com/kleisath/index.php/2009/09/multi-tenant-database-architecture-%E2%80%93-part-1/    (All 5 parts of this article) ...

This trick works only for Windows OS (tested on XP)  Edit: For other versions of windows, it might differ slightly, but the basic idea remains the same. In many companies, schools, colleges, and other shared restricted networks, desktop-background, screen-savers are fixed and boring (mostly)..and changing them through desktop themes manager (generally through right-clicking on desktop and then properties/OR in Windows higher versions through Personalize) is disabled by your network-Admin and using options like using regedit.exe, gpedit.msc, and others...too are not possible, because probably those too are disabled or you don't know enough about them. Keep in mind, in network-managed computers, Network-Administrators do run scripts to restart, to update, to change wallpapers/screensaver of all computers periodically, etc. Then in that case, there is a simple trick which we can do to change desktop-background. Go to - (actually the name of file which i...