https://github.com/fiddlerwoaroof/data-lens

Functional utilities for Common Lisp
https://github.com/fiddlerwoaroof/data-lens

data data-transformation functional-programming lisp transducers

Last synced: 3 months ago
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Functional utilities for Common Lisp

• Host: GitHub
• URL: https://github.com/fiddlerwoaroof/data-lens
• Owner: fiddlerwoaroof
• License: apache-2.0
• Created: 2017-08-13T19:58:09.000Z (about 8 years ago)
• Default Branch: master
• Last Pushed: 2025-06-28T22:02:50.000Z (3 months ago)
• Last Synced: 2025-07-14T05:16:58.166Z (3 months ago)
• Topics: data, data-transformation, functional-programming, lisp, transducers
• Language: Common Lisp
• Homepage: https://fiddlerwoaroof.github.io/data-lens/
• Size: 222 KB
• Stars: 31
• Watchers: 6
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.org
  • License: LICENSE

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README

          
* Intro

This library provides a language for expressing data manipulations as

the composition of more primitive operations.

#+BEGIN_SRC lisp

  DATA-LENS> (funcall (on (alexandria:compose

                           (over (transform-tail (over (slice 1))))

                           (compress-runs :collector 'combine-matching-lists))

                          (alexandria:compose 

                           (over (juxt (element 0)

                                       'identity))

                           (sorted 'char<

                                   :key (element 0))))

                      '("January" "February" "March" "April"

                        "May" "June" "July" "August"

                        "September" "October" "November" "December"))

  #| ==> ((#\A "pril" "ugust")

          (#\D "ecember")

          (#\F "ebruary")

          (#\J "anuary" "une" "uly")

          (#\M "arch" "ay")

          (#\N "ovember")

          (#\O "ctober")

          (#\S "eptember")) |#

#+END_SRC