Ruby concatenate strings and add spaces

Question

I have 4 string variables name, quest, favorite_color, speed that might be empty. I want to concatenate them all together, putting spaces between those that aren\'

Answer 1

You can use inject:

[name,quest,favorite_color,speed].inject("") {|k,v| v.empty? ? k : k << " " << v }.strip

Answer 2

Try [name,quest,favorite_color,speed].join(' ').squeeze(' ')

Answer 3

[name, quest, favorite_color, speed].reject(&:empty?).join(' ')