Search for specific parameters in an array and retrieve them

I have been attempting to sift through an array of data retrieved from my API, but unfortunately, the data remains unfiltered. I suspect that it might be due to the way I implemented my method or perhaps my params are not being returned correctly. Below are both of my code snippets. Any help would be greatly appreciated. Thank you.

Code snippet for filtering data:

    const [catalogueArray, setCatalogueArray] = useState([])

    useEffect(() => {

        catalogueList()

    }, [])

    const catalogueList = () => {

        const catalogue = data.filter(item => {
            item.storeName === navigation.state.params.enteredStore
            return { ...item }
        })
        setCatalogueArray(catalogue)
    }

Code snippet for setting Params:

const handleSelectedStore = (name) => {
      setSelectStore({ selectStore: name })
      navigation.navigate('StoreCatalogue', { selectStore: name })
    }

Answer №1

When using the filter() method, make sure to return a boolean value for effective filtering. Keep in mind that objects are considered truthy so returning an object will not result in proper filtering.

The comparison with == before the return statement is unnecessary if you are not utilizing the result of that comparison anywhere else in your code.

If you want to filter based on equality, ensure that the correct comparison is being returned. For adding new objects to the array, consider using the map() method in a separate step.

const catalogue = data.filter(item => {
     return item.storeName == navigation.state.params.enteredStore               
}).map(item => ({ ...item }));

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