Boost::Spirit. Parse string excluding substrings [closed] - c++

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How to parse a string using boost::spirit excluding defined substrings?
For example, a string must not contain $lf, $pt, $kf

You may mean
*(qi::char_ - (qi::lit("$if") | qi::lit("$pt") | qi::lit("$kf"))

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Extracting a word between two parenthesis regex [closed]

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I am trying to extract word General using Pyspark regex from the following string:
:52.089;emailI_Pm|T(General)|20000;ml2736
How can I do it?
Thanks
re.match(r".*\((.*)\).*", ":52.089;emailI_Pm|T(General)|20000;ml2736")[1]

Regex expression to replace string with * [closed]

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I need to convert string like this to
ABC_464_aDE.hmi_2df
to ABC464aDE.* that is want to remove all _ and add * at the end after dot. And my project requirement is to do this using regex. Please help to sort this out.
Thanks
If you are using C# the you can use this code
txt=Regex.Replace(txt.Replace("_",""), #"\.\w+", "");

Regex exclude &# [closed]

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How to determine that string doesn't contain both symbols &# together using regular expression ?
You can use a negative lookahead:
/^(?!.*&#)(.*)/m
Demo

Remove hastag/pound/octothorpe from string in R [closed]

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I have a string which has a hastag/pound/octothorpe in it, and want it removed using a regex expression.
e.g.
iii <- '#lkdjljf, lkdflsdkf'
i would like a gsub(regex_bit_here,'',iii)
to remove the hastag/pound/octothorpe
Thanks
I have triedgsub("^#",'',iii), and it works

regex: check if values exist in between commas [closed]

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In Perl, I would like to determine if a given string is valid, the rule is to check if values exist between commas.
e.g. abc,abc is a valid case, but abc, or abc,,abc are not.
m/^\s*,|,\s*,|,\s*$/
matches all invalid combinations, assuming whitespace does not count as "values".