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 sequences ;
8 : assoc-harvest ( assoc -- assoc' )
9 [ nip empty? not ] assoc-filter ; inline
11 : deep-at ( assoc seq -- value/f )
12 [ swap at ] each ; inline
14 : zip-as ( keys values exemplar -- assoc )
16 [ 2array ] swap 2map-as
18 [ dup length ] dip new-assoc
19 [ [ set-at ] with-assoc 2each ] keep
22 : substitute! ( seq assoc -- seq )
25 : assoc-reduce ( ... assoc identity quot: ( ... prev key value -- next ) -- ... result )
26 [ >alist ] 2dip [ first2 ] prepose reduce ; inline
28 : reduce-keys ( ... assoc identity quot: ( ... prev elt -- ... next ) -- ... result )
29 [ drop ] prepose assoc-reduce ; inline
31 : reduce-values ( ... assoc identity quot: ( ... prev elt -- ... next ) -- ... result )
32 [ nip ] prepose assoc-reduce ; inline
34 : sum-keys ( assoc -- n ) 0 [ + ] reduce-keys ; inline
36 : sum-values ( assoc -- n ) 0 [ + ] reduce-values ; inline