RegEx.DLL provides some much needed regular-expression handling for VB programmers. The 'clsRegEx' class implements all the common UNIX wildcard characters allowing sophisticated string comparisons and search-and-replace operations to be performed. * The '*' character represents zero or more occurrences of the previous character in the expression: ab*c matches ac, abc, abbc, abbbbbbbc ... * The '+' character represents one or more occurrences of the previous character in the expression: ab+c matches abc, abbc, abbbbbbbc but not ac * Numbers within curly brackets represent a specific number of occurrences of the previous character: a{3} matches aaa a{3,5} matches aaa, aaaa and aaaaa * The '?' character represents zero or one occurrences of the previous character: a?c matches ac and aac * The '.' character represents any single character: a.c matches abc, aXc but not ac or abbc Round brackets can be used to apply multipliers, such as '*' or '+', to groups of characters: * (abc)* matches an empty string, abc, abcabc, abcabcabc ... * (abc)+ matches abc, abcabc, abcabcabc ... Square brackets can be used to specify possible values for a single character. A hyphen can be used in this context to represent a range of characters. If the first character within the brackets is a '^' then the range is exclusive rather than inclusive (ie. the expression matches any single character not shown): * a[bB]c matches abc and aBc * a[^0-9]c matches abc and aXc but not a0c ... a9c A '' symbol negates the special meaning of the following character. Only valid if it precedes one of *+?{([])}. * a*c matches a*c * a[[]]c matches a]c and a[c * a\c matches ac * abc is not a valid expression The download includes VB code samples demonstrating how to use the library. This library is still in beta test - it works well for short expressions, but due to the recursive nature of the code longer strings can take a while.
VERSION HISTORY
- Version 0.6.0 posted on 2004-01-25
Program Details
- Category: Development > Components & Libraries
- Publisher: Codebox Software
- License: Free
- Price: N/A
- Version: 0.6.0
- Platform: windows