! Copyright (C) 2012 John Benediktsson, Doug Coleman
! See http://factorcode.org/license.txt for BSD license
-USING: arrays assocs assocs.private fry generalizations kernel
-math math.statistics sequences sequences.extras sets ;
+USING: arrays assocs assocs.private kernel math math.statistics
+sequences sets ;
IN: assocs.extras
+: push-at-each ( value keys assoc -- )
+ '[ _ push-at ] with each ; inline
+
: deep-at ( assoc seq -- value/f )
[ of ] each ; inline
: expand-keys-push-at-as ( assoc exemplar -- hashtable' )
[
[ swap dup sequence? [ 1array ] unless ]
- [ '[ _ push-at ] with each ]
+ [ push-at-each ]
] dip assoc>object ;
: expand-keys-push-at ( assoc -- hashtable' )
: intersect-keys ( assoc seq -- elts )
[ of ] with zip-with sift-values ; inline
-: values-of ( assoc seq -- elts )
- [ of ] with map sift ; inline
+: values-of ( assoc seq -- seq' )
+ [ of ] with map ; inline
: counts ( seq elts -- counts )
[ histogram ] dip intersect-keys ;
+
+: histogram-diff ( hashtable1 hashtable2 -- hashtable3 )
+ [ neg swap pick at+ ] assoc-each
+ [ 0 > ] filter-values ;
+
+: collect-by-multi! ( ... assoc seq quot: ( ... obj -- ... new-keys ) -- ... assoc )
+ [ keep swap ] curry rot [
+ [ push-at-each ] curry compose each
+ ] keep ; inline
+
+: collect-by-multi ( ... seq quot: ( ... obj -- ... new-keys ) -- ... assoc )
+ [ H{ } clone ] 2dip collect-by-multi! ; inline
+
+
+: collect-assoc-by! ( ... assoc input-assoc quot: ( ... key value -- ... key' value' ) -- ... assoc )
+ rot [ '[ @ swap _ push-at ] assoc-each ] keep ; inline
+
+: collect-assoc-by ( ... input-assoc quot: ( ... key value -- ... key value ) -- ... assoc )
+ [ H{ } clone ] 2dip collect-assoc-by! ; inline
+
+: collect-key-by! ( ... assoc input-assoc quot: ( ... key -- ... new-key ) -- ... assoc )
+ rot [ '[ drop _ keep swap _ push-at ] assoc-each ] keep ; inline
+
+: collect-key-by ( ... input-assoc quot: ( ... key -- ... new-key ) -- ... assoc )
+ [ H{ } clone ] 2dip collect-key-by! ; inline
+
+: collect-value-by! ( ... assoc input-assoc quot: ( ... value -- ... new-key ) -- ... assoc )
+ rot [ '[ nip _ keep swap _ push-at ] assoc-each ] keep ; inline
+
+: collect-value-by ( ... input-assoc quot: ( ... value -- ... new-key ) -- ... assoc )
+ [ H{ } clone ] 2dip collect-value-by! ; inline
+
+
+: collect-assoc-by-multi! ( ... assoc input-assoc quot: ( ... key value -- ... new-keys value' ) -- ... assoc )
+ rot [ '[ @ swap _ push-at-each ] assoc-each ] keep ; inline
+
+: collect-assoc-by-multi ( ... assoc quot: ( ... key value -- ... new-keys value' ) -- ... assoc )
+ [ H{ } clone ] 2dip collect-assoc-by-multi! ; inline
+
+: collect-key-by-multi! ( ... assoc input-assoc quot: ( ... key -- ... new-keys ) -- ... assoc )
+ rot [ '[ drop _ keep swap _ push-at-each ] assoc-each ] keep ; inline
+
+: collect-key-by-multi ( ... assoc quot: ( ... key -- ... new-keys ) -- ... assoc )
+ [ H{ } clone ] 2dip collect-key-by-multi! ; inline
+
+: collect-value-by-multi! ( ... assoc input-assoc quot: ( ... value -- ... new-keys ) -- ... assoc )
+ rot [ '[ nip _ keep swap _ push-at-each ] assoc-each ] keep ; inline
+
+: collect-value-by-multi ( ... assoc quot: ( ... value -- ... new-keys ) -- ... assoc )
+ [ H{ } clone ] 2dip collect-value-by-multi! ; inline