09-10-2007
Yes it's almost right. The operator "!~" means "does not match regexp".
The given regular expression matches exactly the word "abc" in the second field, so all the lines that does match this criteria are discarded.
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Hi All,
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file_in_1:
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
17 18 19 20
21 22 23 24
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29 30 31 32
file_in_2:
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state city zone
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123
324
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235
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two txt
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abc one 000 456 abc
abc one 000 122 abc
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LEARN ABOUT DEBIAN
shevek_regexp
shevek::regexp(3) Library Functions Manual shevek::regexp(3)
NAME
shevek::regexp -
Use regular expressions.
SYNOPSIS
#include <regexp.hh>
Public Member Functions
regexp (std::string const &pattern=std::string(), bool case_sensitive=false)
Create a new object, and optionally fill it with a pattern.
regexp & operator= (std::string const &pattern)
Set a pattern, removing the previous one.
regexp (regexp const &that)
Copy a regexp.
regexp & operator= (regexp const &that)
Copy a regexp.
void case_sensitive (bool value=true)
Set whether the evaluation should be case sensitive.
~regexp ()
Destructor, this cleans up internal structures.
bool operator() (std::string const &data)
Check whether the pattern matches a string, and fill internal match structures if it does.
std::string operator[] (unsigned idx) const
Retrieve the value of a subexpression from the last matched string.
bool valid (unsigned idx) const
Test whether a subexpression was filled by the last matching string.
unsigned size () const
Get the number of subexpression.
std::string transform (std::string const &data) const
Transform a string with -codes according to the last matching string.
std::string const & pattern () const
Get the current pattern.
Detailed Description
Use regular expressions.
Member Function Documentation
std::string shevek::regexp::operator[] (unsignedidx) const
Retrieve the value of a subexpression from the last matched string. This throws an exception if the subexpression is not valid.
Author
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libshevek Fri May 11 2012 shevek::regexp(3)