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philm/Join string with commas if item exists

Created January 18, 2010 23:50
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Join string with commas if item exists
city = 'San Francisco'
state = 'CA'
[city, state].compact * ', '
# => 'San Francisco, CA'
city = nil
state = 'CA'
[city, state].compact * ', '
# => 'CA'
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