in reply to Addition of hashes

Using a reference as a number produces an integer representing its storage location in memory. The only useful thing to be done with this is to compare two references numerically to see whether they refer to the same location

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Re^2: Addition of hashes
by morgon (Priest) on Feb 03, 2017 at 15:30 UTC
    To expand a bit:

    The value of a hashref depends on the context - and not only scalar vs list, but it's different between numeric and string context, e.g. 

    perl -e 'print {}'   # string-context
HASH(0x114dcb8)

perl -e 'print 0 + {}'  # numeric context
18996408

perl -e '{} + 0'    # does not compile
syntax error at -e line 1, near "} +"

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