accumulators
Accumulators are libraries that help aggregate values by building lists, strings, or other data structures out of the pieces.

  • arnesi - arnesi is a collection of utilities written by Marco Baringer
  • COLLECTING - LOOP has a COLLECT clause which is nice and handy
  • collectors - collectors is a common lisp library that aims to ease accumulating values (similar to loop/iter's collecting / appending clauses)
  • General accumulator - General-purpose, extensible value accumulator library
  • group-by - Group-by is a Common Lisp library to help group data into trees (of various formats) based on common/shared values
  • track-best - There are several libraries that support collecting things generated in loops (e.g