2 dropdown select option iterating through same array but should not be able to select same selected-CodePudding

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2 dropdown select option iterating through same array but should not be able to select same selected

Time：09-27

Currently I am trying to build 2 dropdown select option component that only shows columns, but the point is that it should not display the already selected value in other dropdown select option. So each value can only be selected once. So how can I fix that in the code.

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Tags：

javascript

reactjs

dropdown

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