join can take arbitrary lists, whereas . (dot) concatenates the left hand side with the right hand side.

sub concat {
    return join '', @_;
}

[download]

Or if you only want to work with two args, there is the dot operator:

sub concat {
    return $_[0] . $_[1];

[download]

Interpolation also works: 

sub concat {
    local $" = '';
    return "@_";
}

[download]

Unless you can think of a good reason otherwise, the first solution is probably the most clear and flexible -- a more generalized solution.

I think Perl was given the smallest possible operator (dot) for concatenation of strings to make the C people feel bad.


Dave

In reply to Re: Concatenation(Brain Fart) by davido
in thread Concatenation(Brain Fart) by rolandomantilla

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