quantifiers

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Can someone explain to be what is going on here? existential universal quantifications

I have to program (C++) and find the true value of the following. I am uncertian as to what it exactly means.[详细]

2023-04-12 16:13 分类：问答
Why is the rightmost character captured in backreference when using a character class with quantifiers?

If I have pattern ([a-z]){2,4} and string \"ab\", what would I expect to see in backre开发者_如何学编程ference \\1 ?[详细]

2023-04-06 20:24 分类：问答
Regex optional group fails whole search [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical andcannot be reasonably answered in its current form. For help 开发者[详细]

2023-04-01 10:33 分类：问答
Java regex very slow (translate nested quantifiers to possessive quantifiers)

I\'ve found this regular expression to match urls (originally in Javascript by Daring Fireball) which in java works but in some cases is extremly slow:[详细]

2023-03-20 14:00 分类：问答
How can I access capture buffers in brackets with quantifiers?

How can I access capture buffers in brackets with quantifiers? #!/usr/local/bin/perl use warnings; use 5.014;[详细]

2023-03-18 18:23 分类：问答
Perl REGEX Question

As a PHP programmer new to Perl working through \'Programming Perl\', I have come across the following regex:[详细]

2023-03-06 22:13 分类：问答
Populating Automatic Perl Variables when using Quantifiers

I was trying to match the following line 5474c2ef012a759a c11ab88ae8daa276 63693b53799c91f1 be1d8c8738733d80[详细]

2023-03-03 20:34 分类：问答
Represent the English statement into Quantifiers

Here is a statement C(x): x has a catD(x): x has a dogF(x): x has a Ferret re开发者_JAVA技巧present using quantifiers and logical connectives. Under the domain \"all students in your class\"[详细]

2023-03-03 01:10 分类：问答
Emulating possessive quantifiers

Is it possible to emulate possessive quantifiers (.NET doesn’t support it) using ato开发者_如何转开发mic grouping (or in other way)?[详细]

2023-02-22 01:55 分类：问答
alternative greedy match

I want to make a greedy match to开发者_运维知识库 an alternative of either zero to \'m\' consecutive occurences of \'a\' or zero to \'n\' consecutive occurences of \'b\'. If I do[详细]

2023-02-21 18:58 分类：问答