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README file 2nd 3rd
recursively defined data
ref operator 2nd
reference counting
    closures and
    defined
    garbage collection and
    memory management and
    nested data structures and
    subroutine reference example
    weak references and
references [See also array reference blessed references dereferencing hash reference][See also array reference blessed references dereferencing hash reference]
    to filehandles
    bless operator
    destruction and
    hierarchical data and
    instances and 2nd 3rd 4th
    named subroutines
    object destruction and
    overview
    return values
    as scalars
    scoping and
    weak references
require operator
    @INC and
    functionality 2nd
    syntax errors and
    use operation and 2nd
require_version method (Exporter)
return values [See also parameters][See also parameters]
    bless operator and
    coderefs as
    hash references
    required files
    subroutine references
    undef example
    updated parameters
run phase
    BEGIN keyword and
    storage allocation