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As merlyn eluded to above, you can omit parens when you use a & in front of the function call. This has an interesting "side-effect" in that the local @_ is implicitly passed to that sub even though no arguments are explicitly passed. For instance:
foo("\@_ has elements!"); # prints "Surprise! @_ has elements!" bar("\@_ has no elements!"); # prints "Surprise!" sub foo { # absent parens say pass my @_ &baz; } sub bar { # parens say only pass these arguments (nothing) &baz(); } sub baz { print "Surprise! ",join("\t",@_),"\n"; }
This can be handy when golfing but might cause anyone who looks at your code (including you!) some headaches...


In reply to Re: What is the point of the & sigil for function refs? by bpphillips
in thread What is the point of the & / ampersand sigil for function refs? by tphyahoo

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