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An extended definition of "non-overlapping" would save time. #38440

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foolip mannequin opened this issue May 4, 2003 · 2 comments
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An extended definition of "non-overlapping" would save time. #38440

foolip mannequin opened this issue May 4, 2003 · 2 comments
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docs Documentation in the Doc dir type-feature A feature request or enhancement

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foolip mannequin commented May 4, 2003

BPO 732120
Nosy @rhettinger

Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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GitHub fields:

assignee = 'https://github.com/rhettinger'
closed_at = <Date 2003-08-31.05:31:35.000>
created_at = <Date 2003-05-04.09:56:57.000>
labels = ['type-feature', 'docs']
title = 'An extended definition of "non-overlapping" would save time.'
updated_at = <Date 2003-08-31.05:31:35.000>
user = 'https://bugs.python.org/foolip'

bugs.python.org fields:

activity = <Date 2003-08-31.05:31:35.000>
actor = 'rhettinger'
assignee = 'rhettinger'
closed = True
closed_date = None
closer = None
components = ['Documentation']
creation = <Date 2003-05-04.09:56:57.000>
creator = 'foolip'
dependencies = []
files = []
hgrepos = []
issue_num = 732120
keywords = []
message_count = 2.0
messages = ['15861', '15862']
nosy_count = 2.0
nosy_names = ['rhettinger', 'foolip']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue732120'
versions = []
@foolip
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foolip mannequin commented May 4, 2003

Hello.

Yesterday I spent several hours trying to figure out
why a (stupid) regex like "^|foo" didn't return ['',
'foo'] for findall("foo").

Like this:

|f|o|o|
0 1 2 3

I figured the ^ would match 0-0 and then a 0-3 match
for foo. I've learnt since that the reason this can't
happen is because the regexp engine would get caught in
an infinte loop. However, the two matches aren't really
overlapping, and the docs state that all
non-overlapping matches would be returned.

I suggest therefor that it is clarified in the docs
that non-overlapping doesn't apply to a zero-length
match at the beginning of another potential match.

This would apply to findall and finditer in
doc/python2.2/html/lib/node99.html.

@foolip foolip mannequin closed this as completed May 4, 2003
@foolip foolip mannequin assigned rhettinger May 4, 2003
@foolip foolip mannequin added docs Documentation in the Doc dir type-feature A feature request or enhancement labels May 4, 2003
@foolip foolip mannequin closed this as completed May 4, 2003
@foolip foolip mannequin assigned rhettinger May 4, 2003
@foolip foolip mannequin added docs Documentation in the Doc dir type-feature A feature request or enhancement labels May 4, 2003
@rhettinger
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user_id=80475

Nice catch.

Applied fix to Doc/lib/libre.tex 1.103 and 1.101.8.2

@ezio-melotti ezio-melotti transferred this issue from another repository Apr 9, 2022
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