These are queries used with UI picker view - https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIPickerView_Class/index.html
Scrolling to particular row:
query("pickerView",[{selectRow:3},{inComponent:0},{animated:1}])
Read elements from picker view
query("pickerView",:delegate, [{pickerView:nil},{titleForRow:3},{forComponent:0}])
Count Number of items in picker view
query("pickerView",[{selectedRowInComponent:0}])
Does query("pickerView",[{selectedRowInComponent:0}]) return an integer?
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