Returns the position of the last occurrence in the specified string of the given search string.
The highest-index position of value in source if it is found, or -1 if source does not contain value.
If value is an empty string, the return value is the last index position in source.
This function performs a case-sensitive word search using the invariant culture.
string::last-index-of('testing string', 'test') ==> 0
string::last-index-of('testing string', '') ==> 13
string::last-index-of('testing string', 'Test') ==> -1
string::last-index-of('testing string', 'ing') ==> 11
StringFunctions Class | NAnt.Core.Functions Namespace