http://modernperlbooks.com/books/modern_perl_2016/06-perl-regular-expressions.html WebThe regex binding operator ( =~) is an infix operator ( Fixity) which applies the regex of its second operand to a string provided as its first operand. When evaluated in scalar context, a match evaluates to a boolean value representing the success or failure of the match.

Perl Regular Expressions and Matching Modern Perl, 4e

Web7. máj 2024 · ‘ eq ‘ operator in Perl is one of the string comparison operators used to check for the equality of the two strings. It is used to check if the string to its left is stringwise equal to the string to its right. Syntax: String1 eq String2 Returns: 1 if left argument is equal to the right argument Example 1: $a = "Welcome"; $b = "Geeks"; Web18. nov 2024 · The Perl regular expression /^ [Y]?$/i matches an optional Y character case-insensitively. The ? affects the [Y] in that it allows the [Y] to match one or zero characters. This means that the whole regular expression also matches the empty string. The [Y] is … science in indian temples

Regular expression - Wikipedia

The operator =~ associates the string with the regexp match and produces a true value if the regexp matched , or false if the regexp did not match. In our case, World matches the second word in "Hello World" , so the expression is true. Please read http://perldoc.perl.org/perlretut.html WebEz az éra hozta el a modern Perl mozgalmat is. Ez a kifejezés egy olyan fejlesztői kultúrát takar, ami él a CPAN adta lehetőségekkel, kihasználja a nyelv új képességeit, és nagyon komolyan veszi a helyesen működő, jó szoftver készítését. WebThe + operator will match the preceding atom one or more times, for example the expression a+b will match any of the following: ab aaaaaaaab But will not match: b The ? operator will match the preceding atom zero or one times, for example the expression ca?b will match any of the following: cb cab But will not match: caab pratt and whitney north berwick phone number