Linked Questions
15 questions linked to/from regex replace with callback in c++11?
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its possible c++ regex evaluator with lambdas like ruby? [duplicate]
Im trying to learn how I could write a regex evaluator in c++ with lambda expression
5;4
11;2
7;3
inputx.gsub(/(.*?);(.*?)\n/) { ($1.to_i - $2.to_i ).to_s + "\n" }
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How I could do this if ...
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20
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Conditionally replace regex matches in string
I am trying to replace certain patterns in a string with different replacement patters.
Example:
string test = "test replacing \"these characters\"";
What I want to do is replace all ' ' with '_' ...
- 17.6k
1
vote
2
answers
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Selectively replace (") doublequotes in a std::string in C++
I want to selectively replace the (") doublequotes in a C++ std::string.
i.e. i want to replace all occurences of (") doublequotes in a string except the 1st and last occurence of (") doublequotes in ...
- 3,860
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votes
2
answers
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How do I use std::regex_replace to replace string into lowercase?
I find this regex for replacement Regex replace uppercase with lowercase letters
Find: (\w) Replace With: \L$1
My code
string s = "ABC";
cout << std::regex_replace(s, std::regex("(\\w)"), "\\...
- 3,406
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2
answers
1k
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C++ Regex Replace One by One
Suppose my string is "g500() g600() g200()\n g1()" I want to output "g1() g2() g3()\n g4()" instead.
I have tried using regex to do it like so, but this gives each occurence the same value.
#...
- 2,453
2
votes
3
answers
404
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Parse (replace) in C++ std::string
I have a "custom" string that has the following format. Example:
std::string MyString = "RndOrder%5d - RndCustomer%8s - RndHex%8x";
I would like to replace/parse the string:
the %5d (%NUM_d) would be ...
- 378
6
votes
3
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203
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How to match only those numbers which have an even number of `%`s preceding them?
I want to catch numbers appearing anywhere in a string, and replace them with "(.+)".
But I want to catch only those numbers which have an even number of %s preceding them. No worries if any ...
- 2,695
0
votes
2
answers
523
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How to Simplify C++ Boolean Comparisons
I'm trying to find a way to simplify the comparison cases of booleans. Currently, there are only three (as shown below), but I'm about to add a 4th option and this is getting very tedious.
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- 538
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3
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558
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Obtain iterators from std::regex_search and use these in string::replace
I am having ridiculous difficulties matching a regex and replacing the match with another string. I want to achieve this with iterators, as outlined below. The part that does not work is getting ...
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2
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1
answer
624
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Regex to replace all occurrences between two matches
I am using std::regex and need to do a search and replace.
The string I have is:
begin foo even spaces and maybe new line(
some text only replace foo foo bar foo, keep the rest
)
some more text not ...
- 1,506
0
votes
1
answer
281
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Find $number and then replace it with $number+1?
I would like to find $number substrings and then replace them with $number + 1 format.
For example, $1 should become $2 in a string.
So far, I found out how to find $number pattern in a string and ...
- 3,154
0
votes
1
answer
162
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Regex replacement capture followed by digit separation [duplicate]
I'm trying to learn using regex in C++ and I got this code:
std::string s("21\n");
std::regex e("\\b(2)1");
std::cout << std::regex_replace(s, e, "${1}0 first");
I wanna turn
21
into
...
- 33
0
votes
1
answer
283
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Is there a C++ equivalent for Perl's \L in regex replacement strings? [duplicate]
In Perl, I can replace characters with their lowercase version like so:
my $str = "HELLO WORLD HOW ARE YOU TODAY";
$str =~ s/([AEIOU])/\L\1/g;
print $str; # HeLLo WoRLD HoW aRe You ToDaY";
How can I ...
3
votes
2
answers
107
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Replace tag1 tag2 tag3 for x1 x2 x3
I'm very new to regex and C++, so please be easy on me :) !
Given a string like this one:
Input:
string s = "<ph0/>Hello StackOverflow! Thank you for helping! <ph1/>"
I want to replace ...
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1
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0
answers
77
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C++ Regex Iterator Returning Strange Results, Despite Correct Expression
I am reading/modifying an XML file line by line, and I run into some problems when trying to identify some variables.
For example, I have two lines:
I have the following regex ...
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