Line 4 saves the document changes to the backend data store.

第4行代码将文档更改保存到后端数据存储。

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Listing 3 is an example of getting documents from the backend data store.

清单3是从后端数据存储获取文档的示例。

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These objects represent data that needs to be removed from backend data structure.

这些对象表示了需要从后端数据结构中删除的数据。

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Placemeter : Using sensors and backend data, Placemeter collects intel about physical places, analyze it and spit it out in real time.

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But also, think about using data visualization to help you get to the insights faster, through an iterative exploration workflow where the end users interact with a big data backend system in a visualized way.

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The more complicated the data feeds are for your app, the more backend work required.

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