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Top Forums Shell Programming and Scripting Perl:string substitution Pattern: ='abc...', Post 302279068 by Niroj on Wednesday 21st of January 2009 11:33:42 PM
Old 01-22-2009
Quote:
Originally Posted by KevinADC
Code:
my $str = " c1='fgfasfgasggfgff.,akhk', c2='bbbn', c3='hg5 sh' ";
print "Before substitution-> $str\n";
$str =~ s/='[^']*',?/:/g;
print $str;

o/p=> c1: c2: c3:
Smilie Thanks Kelvin ! But could plz explain How does it work for c3='hg5 sh'.
(c3='.....' does not end with a comma "," !!)?

And my 2nd query is why "$str =~ s/='.*',?/:/g;" gives o/p as "c:" , though it should stop at c2='...', bcoz c3='..' doesn't end with a comma..
 

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ICONV_SUBSTR(3) 							 1							   ICONV_SUBSTR(3)

iconv_substr - Cut out part of a string

SYNOPSIS
string iconv_substr (string $str, int $offset, [int $length = iconv_strlen($str, $charset)], [string $charset = ini_get("iconv.inter- nal_encoding")]) DESCRIPTION
Cuts a portion of $str specified by the $offset and $length parameters. PARAMETERS
o $str - The original string. o $offset - If $offset is non-negative, iconv_substr(3) cuts the portion out of $str beginning at $offset'th character, counting from zero. If $offset is negative, iconv_substr(3) cuts out the portion beginning at the position, $offset characters away from the end of $str. o $length - If $length is given and is positive, the return value will contain at most $length characters of the portion that begins at $offset (depending on the length of $string). If negative $length is passed, iconv_substr(3) cuts the portion out of $str from the $offset'th character up to the character that is $length characters away from the end of the string. In case $offset is also negative, the start position is calculated beforehand according to the rule explained above. o $charset - If $charset parameter is omitted, $string are assumed to be encoded in iconv.internal_encoding. Note that $offset and $length parameters are always deemed to represent offsets that are calculated on the basis of the character set determined by $charset, whilst the counterpart substr(3) always takes these for byte offsets. RETURN VALUES
Returns the portion of $str specified by the $offset and $length parameters. If $str is shorter than $offset characters long, FALSE will be returned. SEE ALSO
substr(3), mb_substr(3), mb_strcut(3). PHP Documentation Group ICONV_SUBSTR(3)
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