Assume that $ref refers to a scalar, an array, a hash or to some nested data structure. Explain the following statements:
Submitted by: Administrator$$ref; # returns a scalar
$$ref[0]; # returns the first element of that array
$ref- > [0]; # returns the first element of that array
@$ref; # returns the contents of that array, or number of elements, in scalar context
$&$ref; # returns the last index in that array
$ref- > [0][5]; # returns the sixth element in the first row
@{$ref- > {key}} # returns the contents of the array that is the value of the key "key"
Submitted by: Administrator
$$ref[0]; # returns the first element of that array
$ref- > [0]; # returns the first element of that array
@$ref; # returns the contents of that array, or number of elements, in scalar context
$&$ref; # returns the last index in that array
$ref- > [0][5]; # returns the sixth element in the first row
@{$ref- > {key}} # returns the contents of the array that is the value of the key "key"
Submitted by: Administrator
Read Online Perl Programming Job Interview Questions And Answers
Top Perl Programming Questions
☺ | How do you give functions private variables that retain their values between calls? |
☺ | How many ways can we express string in Perl? |
☺ | How do you match one letter in the current locale? |
☺ | How do I set environment variables in Perl programs? |
☺ | How to open and read data files with Perl |
Top Coding/Programming Categories
☺ | Python Interview Questions. |
☺ | OOP Interview Questions. |
☺ | Software engineering Interview Questions. |
☺ | PHP Interview Questions. |
☺ | VBA (Visual Basic for Applications) Interview Questions. |