Ruby: Concise way to conditionally join strings with newlines? -

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मुझे एक description स्ट्रिंग को एक मौजूदा comments चर में जोड़ने की आवश्यकता है , जिसमें कोई स्ट्रिंग या शून्य शामिल है मैं एक नई लाइन के साथ किसी भी मौजूदा टिप्पणी से नए विवरण को अलग करना चाहता हूं, लेकिन केवल अगर मौजूदा टिप्पणी है मैं कुछ तरह से संक्षिप्त तरीके से आया हूं जो कि संक्षिप्त प्रकार के हैं, 

  old_comments = comments + "\ n" बचाव "" new_comments = old_comments + description
< P> या 

  new_comments = [टिप्पणियां, विवरण] .compact.join ("\ n")

लेकिन मुझे आश्चर्य है कि वहाँ कम नहीं है एक-लाइनर में इसे निचोड़ने के लिए "मुश्किल" तरीका या वहाँ है? 

  [* टिप्पणियाँ, वर्णन]। शामिल करें ($ /)

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