1 ! Copyright (C) 2012 John Benediktsson, Doug Coleman
2 ! See http://factorcode.org/license.txt for BSD license
4 USING: arrays assocs assocs.private kernel math sequences ;
8 : deep-at ( assoc seq -- value/f )
11 : substitute! ( seq assoc -- seq )
14 : assoc-reduce ( ... assoc identity quot: ( ... prev key value -- next ) -- ... result )
15 [ >alist ] 2dip [ first2 ] prepose reduce ; inline
17 : reduce-keys ( ... assoc identity quot: ( ... prev elt -- ... next ) -- ... result )
18 [ drop ] prepose assoc-reduce ; inline
20 : reduce-values ( ... assoc identity quot: ( ... prev elt -- ... next ) -- ... result )
21 [ nip ] prepose assoc-reduce ; inline
23 : sum-keys ( assoc -- n ) 0 [ + ] reduce-keys ; inline
25 : sum-values ( assoc -- n ) 0 [ + ] reduce-values ; inline
27 : if-assoc-empty ( ..a assoc quot1: ( ..a -- ..b ) quot2: ( ..a assoc -- ..b ) -- ..b )
28 [ dup assoc-empty? ] [ [ drop ] prepose ] [ ] tri* if ; inline
30 : assoc-invert-as ( assoc exemplar -- newassoc )
31 [ swap ] swap assoc-map-as ;
33 : assoc-invert ( assoc -- newassoc )
36 : assoc-merge! ( assoc1 assoc2 -- assoc1 )
37 over [ push-at ] with-assoc assoc-each ;
39 : assoc-merge ( assoc1 assoc2 -- newassoc )
40 [ [ [ assoc-size ] bi@ + ] [ drop ] 2bi new-assoc ] 2keep
41 [ assoc-merge! ] bi@ ;
43 GENERIC: delete-value-at ( value assoc -- )
45 M: assoc delete-value-at
46 [ value-at* ] keep swap [ delete-at ] [ 2drop ] if ;
48 ERROR: key-exists value key assoc ;
49 : set-once-at ( value key assoc -- )