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Author SHA1 Message Date
Tim Peters 4e9afdca39 Generalize map() to work with iterators. 
NEEDS DOC CHANGES.
Possibly contentious:  The first time s.next() yields StopIteration (for
a given map argument s) is the last time map() *tries* s.next().  That
is, if other sequence args are longer, s will never again contribute
anything but None values to the result, even if trying s.next() again
could yield another result.  This is the same behavior map() used to have
wrt IndexError, so it's the only way to be wholly backward-compatible.
I'm not a fan of letting StopIteration mean "try again later" anyway.
 2001-05-03 23:54:49 +00:00
Tim Peters efdae3939a Remove redundant copy+paste code. 2001-05-03 07:09:25 +00:00
Tim Peters c307453162 Generalize max(seq) and min(seq) to work with iterators. 
NEEDS DOC CHANGES.
 2001-05-03 07:00:32 +00:00
Tim Peters 0e57abf0cd Generalize filter(f, seq) to work with iterators. This also generalizes 
filter() to no longer insist that len(seq) be defined.
NEEDS DOC CHANGES.
 2001-05-02 07:39:38 +00:00
Tim Peters f553f89d45 Generalize list(seq) to work with iterators. This also generalizes list() 
to no longer insist that len(seq) be defined.
NEEDS DOC CHANGES.
This is meant to be a model for how other functions of this ilk (max,
filter, etc) can be generalized similarly.  Feel encouraged to grab your
favorite and convert it!
Note some cute consequences:
    list(file) == file.readlines() == list(file.xreadlines())
    list(dict) == dict.keys()
    list(dict.iteritems()) = dict.items()
    list(xrange(i, j, k)) == range(i, j, k)
 2001-05-01 20:45:31 +00:00
Guido van Rossum 8b48cf9016 Add test suite for iterators. 2001-04-21 13:33:54 +00:00