The double-dot operator invokes mutator methods to set values for each of the address attributes.

双点运算符调用了mutator方法来设置每个地址属性的值。

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Each attribute in the hash can be accessed or set using the dot operator (as shown in Listing 2).

使用 dot 操作符可以访问或设置 hash 中的每个属性（参见清单 2）。

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To do that, we will invoke the observer method (using the double-dot operator) for the city attribute of the structured type value in the ADDRESS column (Listing 2).

为了实现这个目标，我们将调用observer方法(使用双点运算符)获取address列中的结构化类型值的城市属性。(清单2)。

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The DOT may be on the verge of disclosing that the problem is operator error.

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Independent travellers can also contact a tour operator solely to purchase tickets, or reserve tickets through one of the many hotels that dot the rural Sacred Valley between the city of Cusco and the town of Aguas Calientes, the gateway town to Machu Picchu.

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The DOT crew in Dublin, roughly 10 miles from the crash scene, was called within a minute of the 911 operator's call and had loaded the caution signs into a truck and was en route when the Laurens County sheriff called the agency to report the crash, Goldberg said.

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