About Regular Expression

 

Easy GREP adopts the Regualr Expression of Javascript and VBscript.
It's compatible mostly with other advanced styles of Regular Expression, such as Perl, Java and .Net. Though lacking some complex advanced functions, it can do most common work we usually need.

The VBScript Regular Expression (version 5.5 mostly) is deployed inside vbscript.dll with Internet Explorer (5.5+). As an ActiveX component it can be used in most Windows and by most applications. Though it's very old, but it can already do most things we need. Most important, it's already inside your system, you needn't install .Net frmawork or Java runtime or any other third party RegEx engine.

Fast Speed
Without those complex but rare-used functions, it's simple and fast, can fulfil the strict demand of speed of mass replacing. During our numerous work, this engine is very fast.
Simple Grammar
Second, it's grammar is simple. Comparing to Perl regexp or Java regexp, user needn't write regexp delimiter - "/" at all, which is very confusing when you use "\" to convert characters.
Good Compatibility
The Regular Expression container, vbscript.dll, exists pervasively in most Windows. So this tool can run on Most Windows, even old Win 9x. So users with any Windows, with or without .Net freamework or Java runtime, can use it freely.
Light Weight
User needn't install any additional Regexp engine. Imagine if we use a later regexp engine of .Net of Java, users should install a cumbersome .Net or Java runtime which is hundreds times in size than this tool. (Even a full-functional perl Regexp is serveral times in size than it.)
Excellent Reliability
VBScript Regular Expression was developed by Microsoftm and version 5.5 is a stable version, it's more reliable than other free third-party Regexp engines, which are often in updating or bug fixing.