Home » Articles »

Archive for September, 2010

  • There is more than one way to evaluate a regular expression

    P6R’s RGX™ 1.0 Regular Expression Engine has some unique features that make it stand out from the crowd. One such feature is its regex-oriented tracing. Several others are described below. First, we have added a new global modifier ‘P6MOD_FULLLOOKBEHIND’. This modifier allows the look behind meta character sequences ‘(?<=’ & ‘(?<!’ to match anywhere in […]

  • Do You Know What Your Regular Expressions Are Doing?

    It can be difficult to derive the correct regular expression for the problem you are trying to solve. There are many internet sites (e.g., Regular Expression Tester) and PC applications that help to construct what seems to be the right expression. However, how do you know that that expression is working properly in a production […]