first?()
Instance Public methods
first? is a predicate to test the call is a first call to first? with
current group.
It is useful to format comma separated values as:
q.group(1, '[', ']') {
xxx.each {|yyy|
unless q.first?
q.text ','
q.breakable
end
... pretty printing yyy ...
}
}
first? is obsoleted in 1.8.2.