Rx - DistinctUntilChanged this post will focus on the simple yet very useful DistinctUntilChanged operator.
sometimes a datum stream may produce the same value for a while, you can see it in stock exchange stream the value of specific stock may be steady for a while. the observer can reduce its computation level by ignoring a repeatable value (sequential repeatable value, for none sequential you can use the Distinct operator). the DistinctUntilChanged is having the follow...
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