- (textual-prefix? textual1 textual2 [start1 end1 start2 end2]) → booleanprocedure
- (textual-suffix? textual1 textual2 [start1 end1 start2 end2]) → booleanprocedure
Is textual1 a prefix/suffix of textual2?
The optional start/end indexes restrict the comparison to the indicated subtexts of textual1 and textual2.