Given that delete can delete a slice, this can be simplified: 

my %map = (...);
@$h{values %map} = delete @$h{keys %map};

[download]

Update: note that this doesn't break on %map = (foo => 'bar', bar => 'foo') that the solutions above may do.

lodin

In reply to Re^3: can i rename hashref keys? by lodin
in thread can i rename hashref keys? by leocharre

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