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How to test if a string contains any digits in C++


How to test if a string contains any digits in C++

By : Chris Thorp
Date : October 21 2020, 11:12 PM
Does that help I want to know if a string has any digits, or if there are no digits. Is there a function that easily does this? , Perhaps the following:
code :


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Regex to test whether there are more than two digits in a string

Regex to test whether there are more than two digits in a string


By : user3573054
Date : March 29 2020, 07:55 AM
wish helps you As far as I know, \d{2,} matches 2 or more consecutive digits, but I need to know whether there are any 2 digits in a string. , You can try
code :
^.*\d.*\d.*$
Regex test whether string contains digits

Regex test whether string contains digits


By : Dương Kay
Date : March 29 2020, 07:55 AM
wish helps you I wanted to test if a string contains numbers (at least one number) so I tried out this: , Just try with following regex:
code :
private static final String DIGIT_PATTERN = "\\d+";
Extract first digit sequence from string containing digits, non-digits and then digits

Extract first digit sequence from string containing digits, non-digits and then digits


By : user2392561
Date : March 29 2020, 07:55 AM
I wish this help you Use str.extract with regex \d for extract digits, {,5} means first 5 digits and + is for all digits:
code :
df['first_5_digits'] = df['Col'].str.extract('(\d{,5})')
df['all_digits'] = df['Col'].str.extract('(\d+)')
print (df)
                       Col first_5_digits all_digits
0              111042345--          11104  111042345
1                111042345          11104  111042345
2    110374217dclid=CA-R3K          11037  110374217
3  109202817lciz@MM10082IA          10920  109202817
df['first_5_digits'] = df['Col'].str.extract('(\d+)').str[:5]
Regex to NOT match a string with 10 consecutive digits. The digits may be separated by white space. All other string ret

Regex to NOT match a string with 10 consecutive digits. The digits may be separated by white space. All other string ret


By : Đào Minh Cường
Date : March 29 2020, 07:55 AM
Hope that helps The problem with ^\D*(?! is that, even if a long digit/space string is found in the negative lookahead, the part matched by \D will simply backtrack one character once the negative lookahead matches. Eg, when
code :
^\D*(?!\d{10,}).*
abc1234567890
^(?!.*(\d\s*){10}).*
^\D*+(?!(\s*\d\s*){10,}).*
    ^
Test a string ($text) to see if it contains numeric digits

Test a string ($text) to see if it contains numeric digits


By : Mr.Just1
Date : March 29 2020, 07:55 AM
it helps some times I am trying to test a string to see if it has any numeric digits within it. I try this code and nothing happens: , Try this instead:
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