Why ASYNC AWAIT doesnt work well in use effect in react

Question

im trying to get user location, and then use the location to return relevant data for is location.

but in the second function i get that the location is null (when i console.log(location) it prints the right location, at the second print, the first print is null) it seems like the second function is not waiting until the first one is done.

Here is some code:

from the component

    const location = useSelector(state => state.locationReducer.location);
    useEffect(()=> {
        (async () => {
            await getLocation();

            // here i'm using the location from the first function
            await getInfo(location);
        })()
    }, []);


    const getLocation = async() => {
        try {
            await dispatch(getLocation());
            console.log(location);
        } catch (err) {
            // TODO HANDLE ERROR;
            console.log('Err:', err);
        }
    }

in the action

export const getLocation = locationName => {
    return async dispatch => {
        try {
            const location = **await** locationService.getLocation(locationName);
            **await** dispatch(setLocation(location));
        } catch (err) {
            throw err;
        };
    };
};

const setLocation = location => {
    return {
        type: types.SET_LOCATION,
        location
    };
};

in service

async function getLocation(locationName) {
    try {]
        return **await** axios.get(`${url}/${locationName}`);
    } catch (err) {
        throw err
    };
};

Answer 1

As Per Dan Abramov-

useEffect(() => {
  async function fetchMyAPI() {
    let url = 'http://something';
    let config = {};
    const response = await myFetch(url);
    console.log(response);
  }  
  fetchMyAPI();
}, []);

Here is the link for reference - https://github.com/facebook/react/issues/14326#issuecomment-441680293

Or You can simply use .then()

  useEffect(() => {
    asyncCall().then(setVal);
  });

Article on how to fetch - https://www.robinwieruch.de/react-hooks-fetch-data

Answer 2

df<-data.frame(QID=c(1,2,3,4,5,6,7),
               ABC_ABC=c(1,0,1,1,0,1,0),
               DEF_DEF=c(0,1,0,0,0,0,0),
               GHJ_GHJ=c(0,0,0,0,1,0,0),
               None=c(0,0,0,0,0,0,1),
               model=c(1,2,1,1,3,1,4))

nm <- names(df)[-c(1, 6)]
index <- apply(df[, -c(1, 6)], 1, which.max)
df$model_name <- nm[index]

df
#>   QID ABC_ABC DEF_DEF GHJ_GHJ None model model_name
#> 1   1       1       0       0    0     1    ABC_ABC
#> 2   2       0       1       0    0     2    DEF_DEF
#> 3   3       1       0       0    0     1    ABC_ABC
#> 4   4       1       0       0    0     1    ABC_ABC
#> 5   5       0       0       1    0     3    GHJ_GHJ
#> 6   6       1       0       0    0     1    ABC_ABC
#> 7   7       0       0       0    1     4       None

^{Created on 2022-01-17 by the reprex package (v2.0.1)}