Is this correct style? Can be improved without giving $foo a (non empty) default value?
my $fo = q{}; # fo variable is initialized
# ... run code, run...
# (fo will be updated with a real value in this part)
# ... but something forrible happens instead...
print "My homework: $fo" ; # prints "My homework: " and exits
print 'My homework: ',($fo || 'Roses are red, violets are blue. Fo was
+ still empty, so I improvised a default value'); # with poetic result
+s
print 'we have ', ($fo + 2 || 8), 'beans'; # prints: we have 2 beans
print 'we have ', ($fo + 0), 'beans'; # prints: we have 0 beans
print 'we have ',($fo + 0 || 8),'beans'; # but here prints: we have
+8 beans, Why?
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