having the following Firebase structure:
Node
val1:20
val2:30
how to get val1 + val2 as a function return ? and how to create a promise or Observable for firebase object?
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Frank van Puffelen
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devMan
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The Firebase Database doesn't have operators to return aggregate values. If you need the sum of two values, you either have to store that sum (and update it on writes) or calculate it client side. – Frank van Puffelen Feb 16 '17 at 18:53
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well, I find a way by using new Promis to fix this issue – devMan Feb 16 '17 at 20:27
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Good to hear. Promises are one great tool to use when implementing client-side aggregation. – Frank van Puffelen Feb 16 '17 at 22:41