ruby - Coerce to boolean -

given expression may return either truthy value or nil,

truthy_or_nil = [true, 'truthy', nil].sample 

how can coerce result boolean without colleagues or linter complaining?

!!truthy_or_nil # hard see !! on long line, unclear truthy_or_nil || false # linter complains "you can simplify this" !truthy_or_nil.nil? # unclear on long line truthy_or_nil ? true : false # hard see on long line, typing 

i have looked @ following questions , found them unrelated:

• why use !! coerce variable boolean use in conditional expression? - question more specific question because use of !! in conditional expressions. also, it's js.
• in environments take boolean arguments, idea wrap functions instead of allowing them implicitly coerced? - question more merit of technique technique itself.

if question determined too broad, understand. if so, there better place ask it?

the obvious solution create method in kernel à la array, integer, string etc.:

module kernel   def boolean val     !!val   end end 

you add to_bool^† object, à la to_s:

class object   def to_bool     !!self   end end 

or both , have 1 call other. barring either of these, i’d !!x common idiom, lesser known without c background i’ve seen.

^{†really, should to_b keep in-line to_a vs. to_ary, etc. (read more). to_b seems ambiguous me (to bytes? binary?).}