manojsinghnegiwd

function useReducer(reducer, initState) {
  const [state, setState] = useState(initState);

  const dispatch = useCallback((action) => {
    const nextState = reducer(state, action)
    setState(nextState)
  }, [setState, state])

  return [state, dispatch];
}

manojsinghnegiwd

search.query("business")

manojsinghnegiwd

search.loadProviders(searchUsingTerm)

manojsinghnegiwd

const searchUsingType: SearchResultProvider = (searchTerm) => {
  const data = [
    {
      "term": "facebook",
      "type": "social"
    },
    {
      "term": "twitter",
      "type": "social"
    },

manojsinghnegiwd

search.query("business")

manojsinghnegiwd

interface SearchResult {
  term: string
  type: string
}

type SearchResults = SearchResult[]

type SearchResultProvider = (searchTerm: string) => SearchResults

class SearchRecSys {

manojsinghnegiwd

interface SearchResult {
  term: string
  type: string
}

type SearchResults = SearchResult[]

type SearchResultProvider = (searchTerm: string) => SearchResults

class SearchRecSys {

manojsinghnegiwd

const searchUsingTerm: SearchResultProvider = (searchTerm) => {
  const data = [
    {
      "term": "business",
      "type": "term"
    },
    {
      "term": "business tips",
      "type": "term"
    },

manojsinghnegiwd

class SearchRecSys {
  //.....  our other code
  query: SearchResultProvider = (searchTerm) => {
    const results = this.providers.reduce(
      (searchResults, item) => {
        return searchResults.concat(item(searchTerm, this.data))
      },[]
    )
    return results
  }

manojsinghnegiwd

class SearchRecSys {
  //.....  our other code
  loadProviders = (
    providers: SearchResultProvider | SearchResultProvider[]
  ): void => {
    this.providers = this.providers.concat(providers)
  }
  //..... our other code
}