export const applyDrag = ( arr , dragResult ) => { const { removedIndex , addedIndex , payload } = dragResult ; if ( removedIndex === null && addedIndex === null ) return arr ; const result = [ ... arr ] ; let itemToAdd = payload ; if ( removedIndex !== null ) { itemToAdd = result . splice ( removedIndex , 1 ) [ 0 ] ; } if ( addedIndex !== null ) { result . splice ( addedIndex , 0 , itemToAdd ) ; } return result ; } ; export const generateItems = ( count , creator ) => { const result = [ ] ; for ( let i = 0 ; i < count ; i ++ ) { result . push ( creator ( i ) ) ; } return result ; } ;