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add map-index, each-index, 2quot-with, or?, and?

db4
Doug Coleman 2008-01-16 10:19:50 -10:00
parent 27d56e998d
commit 93187f356b
1 changed files with 20 additions and 0 deletions
extra/combinators/lib

20
extra/combinators/lib/lib.factor
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@ -191,3 +191,23 @@ MACRO: construct-slots ( assoc tuple-class -- tuple )
: either ( object first second -- ? )
>r keep swap [ r> drop ] [ r> call ] ?if ; inline
: 2quot-with ( obj seq quot1 quot2 -- seq quot1 quot2 )
>r pick >r with r> r> swapd with ;
: or? ( obj quot1 quot2 -- ? )
>r keep r> rot [ 2nip ] [ call ] if* ; inline
: and? ( obj quot1 quot2 -- ? )
>r keep r> rot [ call ] [ 2drop f ] if ; inline
: prepare-index ( seq quot -- seq n quot )
>r dup length r> ; inline
: each-index ( seq quot -- )
#! quot: ( elt index -- )
prepare-index 2each ; inline
: map-index ( seq quot -- )
#! quot: ( elt index -- obj )
prepare-index 2map ; inline