Arcgis Esri Map: need example with json or array

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I am trying to create a map where I can draw a selection area, and get info of all graphic pointers under it, I tried to modify the following example, but they are using web service and queries, and I want it with json or array.

Thats the example I am following http://developers.arcgis.com/javascript/samples/graphics_extent_query/

I want to get email addresses of pointers after selection.



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