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It’s exactly the same as ||, except that it tests the left hand side’s definiteness instead of its truth. Thus, EXPR1 // EXPR2 returns the value of [...]
The argument of interest is the $wantarray argument. This indicates what return value is expected of the subroutine from where it was called. The subroutine [...]
The caller() function can be used in a subroutine to find out information about where the subroutine was called from and how it was called. Caller takes one [...]
When calling a subroutine with the "&" sigil prefix and no parenthesis, the current @_ array gets implicitely passed to the subroutine being called. This [...]
Many Perl developers use the -w option of the interpreter, especially during the development stages of an application.
This warning option turns on many [...]
Perl provides access to environment variables via the global "%ENV" hash. However, if using the ENV module, it will create global scalars for all the [...]
When we have an array or a list of items and we want to find out the number of occurrences of a particular item then we generally use the following kind of [...]