可以使用初始化器列表对标量变量进行初始化，在这种情况下应用一般的类型窄化规则。
It's okay to use initializer lists to initialize scalar variables, and the usual rule of type narrowing applies in such cases.
SHIP3操作符包含一个语句，该语句表明标量子查询的结果放在一个主机变量中。
The SHIP3 operator contains the statement that shows the result of the scalar subquery being bound in as a host variable.
让我们来研究三类主要的绑定变量：标量、数组和散列。
Let's look at the three main types of tied variables: scalars, arrays, and hashes.
应用推荐