export default syncArrays;
/**
 * Provides a function that synchronizes two arrays, arr1 and
 * arr2. arr2 is a subset of arr1, it includes the elements of arr1 that passes
 * the filter. When elements are added to/removed from arr1, arr2 is updated to
 * include the elements of arr1 that pass the filter. When the order of
 * elements in arr2 changes, arr1 is reordered to have the same order as arr2.
 *
 * This can for example be used to synchronize the array of layers in the map
 * with the array of selected layers, where layers may be added to/removed from
 * the map, and the order of selected layers may change.
 *
 *     let dereg = ngeoSyncArrays(map.getLayers().getArray(), selectedLayers,
 *         true, scope, function(layer) {
 *           // exclude the layer at index 0 in the map
 *           return map.getLayers().indexOf(layer) !== 0;
 *         });
 *
 * This will return a function that can be called to cancel synchronization.
 *
 * @param {T[]} arr1 Array 1.
 * @param {T[]} arr2 Array 2.
 * @param {boolean} reverse `true` if arr2 is in reverse order, `false`
 *     otherwise.
 * @param {angular.IScope} scope Angular scope. Used to watch arr1 and arr2
 *     using $watchCollection.
 * @param {function(T):boolean} filter Filter function.
 * @returns {function()} Function to call to stop synchronization
 * @template T
 * @hidden
 */
declare function syncArrays<T>(arr1: T[], arr2: T[], reverse: boolean, scope: angular.IScope, filter: (arg0: T) => boolean): () => any;