C<$a>. If C<$b> is negative, then C<$a % $b> is C<$a> minus the
smallest multiple of C<$b> that is not less than C<$a> (i.e. the
result will be less than or equal to zero). If the operands
-C<$a> and C<$b> are floting point values, only the integer portion
-of C<$a> and C<$b> will be used in the operation.
+C<$a> and C<$b> are floating point values and the absolute value of
+C<$b> (that is C<abs($b)>) is less than C<(UV_MAX + 1)>, only
+the integer portion of C<$a> and C<$b> will be used in the operation
+(Note: here C<UV_MAX> means the maximum of the unsigned integer type).
+If the absolute value of the right operand (C<abs($b)>) is greater than
+or equal to C<(UV_MAX + 1)>, "%" computes the floating-point remainder
+C<$r> in the equation C<($r = $a - $i*$b)> where C<$i> is a certain
+integer that makes C<$r> should have the same sign as the right operand
+C<$b> (B<not> as the left operand C<$a> like C function C<fmod()>)
+and the absolute value less than that of C<$b>.
Note that when C<use integer> is in scope, "%" gives you direct access
to the modulus operator as implemented by your C compiler. This
operator is not as well defined for negative operands, but it will
X<cmp>
Binary "~~" does a smart match between its arguments. Smart matching
-is described in L<perlsyn/"Smart Matching in Detail">.
+is described in L<perlsyn/"Smart matching in detail">.
This operator is only available if you enable the "~~" feature:
see L<feature> for more information.
X<~~>
X<regexp, options> X<regexp> X<regex, options> X<regex>
X</c> X</i> X</m> X</o> X</s> X</x>
-=item /PATTERN/cgimosx
+=item /PATTERN/cgimosxk
Searches a string for a pattern match, and in scalar context returns
true if it succeeds, false if it fails. If no string is specified
Options are:
- c Do not reset search position on a failed match when /g is in effect.
- g Match globally, i.e., find all occurrences.
i Do case-insensitive pattern matching.
m Treat string as multiple lines.
- o Compile pattern only once.
s Treat string as single line.
x Use extended regular expressions.
+ g Match globally, i.e., find all occurrences.
+ c Do not reset search position on a failed match when /g is in effect.
+ o Compile pattern only once.
+ k Keep a copy of the matched string so that ${^MATCH} and friends
+ will be defined.
If "/" is the delimiter then the initial C<m> is optional. With the C<m>
you can use any pair of non-alphanumeric, non-whitespace characters
C<use warnings> pragma and the B<-w> switch (that is, the C<$^W> variable)
produces warnings if the STRING contains the "," or the "#" character.
-=item s/PATTERN/REPLACEMENT/egimosx
+=item s/PATTERN/REPLACEMENT/egimosxk
X<substitute> X<substitution> X<replace> X<regexp, replace>
X<regexp, substitute> X</e> X</g> X</i> X</m> X</o> X</s> X</x>
Options are:
- e Evaluate the right side as an expression.
- g Replace globally, i.e., all occurrences.
i Do case-insensitive pattern matching.
m Treat string as multiple lines.
- o Compile pattern only once.
s Treat string as single line.
x Use extended regular expressions.
+ g Replace globally, i.e., all occurrences.
+ o Compile pattern only once.
+ k Keep a copy of the original string so ${^MATCH} and friends
+ will be defined.
+ e Evaluate the right side as an expression.
+
Any non-alphanumeric, non-whitespace delimiter may replace the
slashes. If single quotes are used, no interpretation is done on the
projects / p5sagit/p5-mst-13.2.git / blobdiff