http://www.basic-converter.org/stable/CHANGES+-------------------------------+
| December 1, 2016 - 3.5 stable |
+-------------------------------+
- New: INBETWEEN$/OUTBETWEEN$ to get string in between/outside two delimiters (all versions - vovchik)
- New: TOKEN$ to select member of tokenized series based on delimiter (all versions - vovchik)
- New: LOAD$/SAVE/APPEND to load/save/append a file in one step to and from a variable (all versions - vovchik)
- New: TALLY to count the amount of times a string occurs (all versions - vovchik)
Looks like a good source for inspiration
For example, INBETWEEN$/OUTBETWEEN$ resembles my
Extract$()