When you use a hash map as a function call's last parameter, the braces are optional.

当将散列映射用作函数调用的最后一个参数时，括号是可选的。

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To do this, create a hash map as in Listing 3 that contains the row data you want to store in the table.

为此，创建一个如 清单 3 中所示的散列映射，其中包含您想要存储在表中的行数据。

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Instead, you could create a hash map of zip code and weather information, and save that information into the portlet service.

您可以转而创建一个邮政编码和天气信息的散列图，并将此信息保存到Portlet服务中。

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