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lazy-lists: modify examples

darcs
chris.double 2006-09-13 13:09:59 +00:00
parent 668a9cf878
commit d4091e03c6
1 changed files with 4 additions and 3 deletions
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contrib/lazy-lists/examples.factor
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@ -27,7 +27,7 @@ USING: lazy-lists math kernel sequences test ;
IN: lazy-examples IN: lazy-examples
: naturals 0 lfrom ; : naturals 0 lfrom ;
: positves 1 lfrom ; : positives 1 lfrom ;
: evens 0 [ 2 + ] lfrom-by ; : evens 0 [ 2 + ] lfrom-by ;
: odds 1 lfrom [ 2 mod 1 = ] lsubset ; : odds 1 lfrom [ 2 mod 1 = ] lsubset ;
: powers-of-2 1 [ 2 * ] lfrom-by ; : powers-of-2 1 [ 2 * ] lfrom-by ;
@ -43,6 +43,7 @@ IN: lazy-examples
#! Given a lazy list of numbers, filter multiples of n #! Given a lazy list of numbers, filter multiples of n
swap [ divisible-by? not ] curry lsubset ; swap [ divisible-by? not ] curry lsubset ;
: primes 2 lfrom [ filter-multiples ] lapply ; : primes ( -- list )
2 lfrom [ filter-multiples ] lapply ;
: first-ten-primes 10 primes ltake list>array ; : first-ten-primes 10 primes ltake list>array ;