I am reading somebody else's code, always a good learning process. The code is
about a telephone contact list. The intent of this line of code is clear:
'does the logged in person have a cell phone, and does the cell phone have the
attribute line=dc'
There is one confusing step in the syntax:
if ((@{$info{$loggedin}}{cell}) and
(@{$info{$loggedin}}{line} eq 'dc'))
{stuff to
execute}
When I read the condition, this is what I see:
a) $loggedin is scalar
b) $loggedin is used as a hash key
c) info is a hash
d) since we retrieve on thing from the hash, there is a '$' in front of info
e) $info{$loggedin} is enclosed inside @{}
f) @{} is a way of derefencing an array reference.
g) $info{$loggedin} is inside @{}, so we have @{$info{$loggedin}}
h) does @{$info{$loggedin}} evaluate to an array? That would confuse me
because {cell} imposes {} on an array?
i) does @{$info{$loggedin}}{cell} retrieve something from a hash? Also a
confusion, because of the @
j) Where am I going wrong????
All help appreciated...
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