Hi,
have you try with (World>>Help>>Help Browser>>Regular Expressions
Framework>>Usage)
SUBEXPRESSION MATCHES
After a successful match attempt, you can query the specifics of which
part of the original string has matched which part of the whole
expression.
A subexpression is a parenthesized part of a regular expression, or
the whole expression. When a regular expression is compiled, its
subexpressions are assigned indices starting from 1, depth-first,
left-to-right. For example, `((ab)+(c|d))?ef' includes the following
subexpressions with these indices:
1: ((ab)+(c|d))?ef
2: (ab)+(c|d)
3: ab
4: c|d
After a successful match, the matcher can report what part of the
original string matched what subexpression.
And theres an example
This facility provides a convenient way of extracting parts of input
strings of complex format. For example, the following piece of code
uses the 'MMM DD, YYYY' date format recognizer example from the
`Syntax' section to convert a date to a three-element array with year,
month, and day strings (you can select and evaluate it right here):
| matcher |
matcher := RxMatcher forString:
'(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[
]+(:isDigit::isDigit:?)[ ]*,[ ]*(19|20)(:isDigit::isDigit:)'.
(matcher matches: 'Aug 6, 1996')
ifTrue:
[Array
with: (matcher subexpression: 5)
with: (matcher subexpression: 2)
with: (matcher subexpression: 3)]
ifFalse: ['no match']
(should answer ` #('96' 'Aug' '6')').
you could make two subexpressions
'([\s.;\:!?]*)(#\w+)'
first subexpression is ([\s.;\:!?]*)
and second subexpression is (#\w+)
and then use
It understandards these
messages:
subexpressionCount
Answers the total number of subexpressions: the highest value that
can be used as a subexpression index with this matcher. This value
is available immediately after initialization and never changes.
subexpression: anIndex
An index must be a valid subexpression index, and this message
must be sent only after a successful match attempt. The method
answers a substring of the original string the corresponding
subexpression has matched to.
On Mon, Aug 8, 2016 at 7:10 PM, Casimiro - GMAIL <[email protected]
> wrote:
> If someone can help me... I'm dealing with the following situation:
>
>
> I may have a string in which matches of the following regex:
> '[\s.;\:!?]*#\w+' may happen (multiple times). I want to replace the
> #\w+ part of it by nothing but keep the [\s.;\:!?]* but it seems to be
> no easy way using copyWithRegex: matchesTranslatedWith: or
> copyWithRegex: matchesReplacedWith:
>
> Someone knows an easy (meaning, no several operations, etc) to do this????
>
>
> Thanks in advance,
>
>
> Casimiro Barreto
>
>
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