当您有一个简单的条件和一个可能复杂的主体时,条件构造很容易编写:
if simple_condition_expressed_in_one_liner
complicated_body_that_may_be_long
complicated_body_that_may_be_long
complicated_body_that_may_be_long
end
但有时候,你的情况很复杂, body 很简单,就像这样:
if condition1 and
condition2 and
condition3 and
some_more_complicated_condition_that_cannot_be_written_on_a_single_line and
still_some_more_complicated_condition_that_cannot_be_written_on_a_single_line
simple_body
end
这样的话,有什么好的写法吗?
最佳答案
我总是尝试重构为更小的描述方法。
使用您的示例,而不是:
until (print "Username : "; gets.chomp == "user") and
(print "Password : "; gets.chomp == "pa$$word")
puts "Error, incorrect details"
end
我会使用:
def correct_user
print "Username : "
gets.chomp == "user"
end
def correct_password
print "Password : "
gets.chomp == "pa$$word"
end
until correct_user and correct_password
puts "Error, incorrect details"
end
关于ruby - 如何写一个复杂的条件,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/15883541/