syntax:
unless-expr ::= expr 'unless' expr 'in which case' expr
semantics: the unless-expr given by E unless C in which case A is equivalent to if C then A else E
example:
data = (
get_actual_data()
unless should_spoof_data in which case get_spoof_data()
)
Ruby's unless is syntactic sugar over if not:
if score > 10
puts "you win"
end
# equivalent to
unless score <= 10
puts "you win"
end
# can also be used in expression position
puts "you win" unless score <= 10
# furthermore, you can use else if you're feeling spicy lol
unless score <= 10
puts "you win"
else
puts "you're still playing"
end
Ooooh yes, I’m too lisp brained to understand using parens merely for order of operations lmao. I suspect you can do that but I’ll have to check once I’m on my computer again.
2.7.2 :003 > (puts "hello" if a > 9) unless a == 10
=> nil
2.7.2 :004 > puts "hello" if a > 9 unless a == 10
=> nil
to reduce thread indentation, yes this works lol