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| author | Hugo Hörnquist <hugo@lysator.liu.se> | 2020-06-01 13:06:41 +0200 |
|---|---|---|
| committer | Hugo Hörnquist <hugo@lysator.liu.se> | 2020-06-01 13:06:41 +0200 |
| commit | 91b01265606283829da62e3c6c5aadcf7c80cfc8 (patch) | |
| tree | 6226d755f1d2d111f67c187d673f09c647437444 /module/util.scm | |
| parent | Document assq-merge. (diff) | |
| download | calp-91b01265606283829da62e3c6c5aadcf7c80cfc8.tar.gz calp-91b01265606283829da62e3c6c5aadcf7c80cfc8.tar.xz | |
Add assq-limit.
Diffstat (limited to 'module/util.scm')
| -rw-r--r-- | module/util.scm | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/module/util.scm b/module/util.scm index 6d8aeaf7..b168ffc4 100644 --- a/module/util.scm +++ b/module/util.scm @@ -384,6 +384,11 @@ (assq-set! alist k (append v (or o '()))))) (copy-tree a) b)) +(define*-public (assq-limit alist optional: (number 1)) + (map (lambda (pair) + (take-to pair (1+ number))) + alist)) + (define-public (group-by proc lst) (let ((h (make-hash-table))) (for value in lst |