which means you won't have much use of nested loops with map

Could you explain what you mean there? map localizes $_, so nested maps are not a problem. Code like the following (admittedly contrived) snippet works as expected ($_ is not clobbered by the inner map): 

my @list = (
    ["Barney", "Rubble"],
    ["Fred", "Flintstone"],
    ["Betty", "Rubble"],
    ["Wilma", "Flintstone"]
);

map {
    say "Outer map before: @$_";
    map { 1 } @$_;
    say "Outer map after : @$_";
} @list;

[download]

But perhaps there's other pitfalls, so I'd be grateful for any enlightenment.

In reply to Re^2: Concise foreach expression by AppleFritter
in thread Concise foreach expression by ram31

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