When you tie a variable, the TIE* method, in this case TIESCALAR, has to return an object. An object is nothing more than a blessed reference. \my $i is a reference to the variable $i. bless blesses its argument. If bless is given just one argument, it blesses the reference to the current package.

The first argument to the FETCH method is the object returned from bless. $_[0] is the first argument of a method, and ${EXPRESSION THAT RETURNS A SCALAR REFERENCE} is a way to dereference a scalar reference. So, you get back the $i.

In reply to Re^3: Joining an array by JavaFan
in thread Joining an array by tangent

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