Ruby函數將返回最後一條語句,在您的案例1..5
中。爲了說明我給它一個不同的返回值:
def test(rows)
(1..rows).each {|n| puts "#{ n } "}
return 'mashbash'
end
# Just the function invokation, only the function will print something
test(5) # => "1 2 3 4 5 "
# Same as above, plus printing the return value of test(5)
puts test(5) # => "1 2 3 4 5 mashbash"
你可以寫一個略有不同的例子來實現你喜歡什麼:
def second_test(rows)
# Cast range to an array
array = (1..rows).to_a # [1, 2, 3, 4, 5]
array.join(', ') # "1, 2, 3, 4, 5", and it is the last statement => return value
end
# Print the return value ("1, 2, 3, 4, 5") from the second_test function
p second_test(5)
# => "1, 2, 3, 4, 5"
謝謝,這使得它非常清晰和易於理解 – mashbash