##
&hashOfArraysRef(\$distri{$probExpr[0]});
####
$disti{$probExpr[0]} = function_that_returns_anonymous_array();
####
$disti{$probExpr[0]} = function_that_returns_anonymous_array($probExpr[0]);
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$disti{$_} = function_that_returns_anonymous_array($_) for @probExpr;