I've seen Ruby code in which there are only two double quotes ("") on a line. What does that line do?
我曾见过Ruby代码，其中一行中只有两个双引号(“”)。这条线是做什么的?
2 个解决方案
#1
5
I assume you might have seen a code like this.
我想你可能见过这样的代码。
def some_method
#do some operations
""
end
In this context, it means that the method is returning an empty string. In Ruby, the last evaluated operation in a method is what is returned from that method. So in this case, it returns an empty string literal.
在此上下文中，它意味着该方法返回一个空字符串。在Ruby中，方法中最后的计算操作是从该方法返回的。在本例中，它返回一个空字符串文字。
#2
2
Two double quotes represent an literal empty string in Ruby. And in many other languages.
两个双引号表示Ruby中的文字空字符串。还有很多其他语言。
#1
5
I assume you might have seen a code like this.
我想你可能见过这样的代码。
def some_method
#do some operations
""
end
In this context, it means that the method is returning an empty string. In Ruby, the last evaluated operation in a method is what is returned from that method. So in this case, it returns an empty string literal.
在此上下文中，它意味着该方法返回一个空字符串。在Ruby中，方法中最后的计算操作是从该方法返回的。在本例中，它返回一个空字符串文字。
#2
2
Two double quotes represent an literal empty string in Ruby. And in many other languages.
两个双引号表示Ruby中的文字空字符串。还有很多其他语言。