Function difference

packages/query-core/src/queriesObserver.ts:12–15

(array1: Array<T>, array2: Array<T>)

import type { QueryClient } from './queryClient'

function difference<T>(array1: Array<T>, array2: Array<T>): Array<T> {
  const excludeSet = new Set(array2)
  return array1.filter((x) => !excludeSet.has(x))
}

type QueriesObserverListener = (result: Array<QueryObserverResult>) => void