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sets.extras: adding mapped-set.

db4
John Benediktsson 2014-06-03 10:13:51 -07:00
parent bdb2d476c1
commit 2b4844e753
2 changed files with 10 additions and 2 deletions
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4
extra/sets/extras/extras-tests.factor
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@ -1,6 +1,6 @@
! Copyright (C) 2013 Doug Coleman.
! See http://factorcode.org/license.txt for BSD license.
USING: tools.test sets.extras ;
USING: math sequences sets.extras tools.test ;
IN: sets.extras.tests
{ { } } [ { } { } setwise-xor ] unit-test
@ -22,3 +22,5 @@ IN: sets.extras.tests
{ "abc" } [ "abc" non-repeating ] unit-test
{ "abc" } [ "abcddd" non-repeating ] unit-test
{ "" } [ "aabbcc" non-repeating ] unit-test
{ HS{ 0 10 20 30 40 } } [ 5 iota [ 10 * ] mapped-set ] unit-test

8
extra/sets/extras/extras.factor
View File

@ -1,6 +1,7 @@
! Copyright (C) 2013 Doug Coleman.
! See http://factorcode.org/license.txt for BSD license.
USING: assocs kernel locals sequences sequences.extras sets ;
USING: assocs hash-sets kernel locals sequences
sequences.extras sets ;
IN: sets.extras
: setwise-xor ( seq1 seq2 -- set )
@ -28,3 +29,8 @@ IN: sets.extras
: adjoin-at* ( value key assoc -- set )
[ [ HS{ } clone ] unless* [ adjoin ] keep dup ] change-at ;
: mapped-set ( ... seq quot: ( ... elt -- ... newelt ) -- ... set )
over length <hash-set> [
[ adjoin ] curry compose each
] keep ; inline