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sequences.modified: little bit more cleanup.

windows-high-dpi
John Benediktsson 2018-02-17 17:08:24 -08:00
parent baddc58f93
commit fb382b52c7
1 changed files with 14 additions and 16 deletions
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30
extra/sequences/modified/modified.factor
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@ -16,15 +16,13 @@ GENERIC: modified-set-nth ( elt n seq -- )
M: modified set-nth modified-set-nth ;
M: modified set-nth-unsafe modified-set-nth ;
INSTANCE: modified sequence
INSTANCE: modified virtual-sequence
TUPLE: 1modified < modified seq ;
M: modified length seq>> length ;
M: modified set-length seq>> set-length ;
M: 1modified like seq>> like ;
M: 1modified new-sequence seq>> new-sequence ;
M: 1modified length seq>> length ;
M: 1modified set-length seq>> set-length ;
M: 1modified virtual-exemplar seq>> ;
TUPLE: scaled < 1modified c ;
@ -33,12 +31,12 @@ C: <scaled> scaled
: scale ( seq c -- new-seq )
dupd <scaled> swap like ;
M: scaled modified-nth ( n seq -- elt )
M: scaled modified-nth
[ seq>> nth ] [ c>> * ] bi ;
M:: scaled modified-set-nth ( elt n seq -- )
M: scaled modified-set-nth
! don't set c to 0!
elt seq c>> / n seq seq>> set-nth ;
[ nip c>> / ] [ seq>> set-nth ] 2bi ;
TUPLE: offset < 1modified n ;
@ -47,11 +45,11 @@ C: <offset> offset
: seq-offset ( seq n -- new-seq )
dupd <offset> swap like ;
M: offset modified-nth ( n seq -- elt )
M: offset modified-nth
[ seq>> nth ] [ n>> + ] bi ;
M:: offset modified-set-nth ( elt n seq -- )
elt seq n>> - n seq seq>> set-nth ;
M: offset modified-set-nth
[ nip n>> - ] [ seq>> set-nth ] 2bi ;
TUPLE: summed < modified seqs ;
@ -59,15 +57,15 @@ C: <summed> summed
M: summed length seqs>> longest length ;
M: summed modified-nth ( n seq -- elt )
M: summed modified-nth
seqs>> [ ?nth [ + ] when* ] with 0 swap reduce ;
M: summed modified-set-nth ( elt n seq -- ) immutable ;
M: summed modified-set-nth immutable ;
M: summed set-length ( n seq -- )
M: summed set-length
seqs>> [ set-length ] with each ;
M: summed virtual-exemplar ( summed -- seq )
M: summed virtual-exemplar
seqs>> ?first ;
: <2summed> ( seq seq -- summed-seq ) 2array <summed> ;