import { Lifted, Pipe } from './lift';
import { Wrapper } from './wrapper';
import { MapWrapper } from './map';
import { SetWrapper } from './set';
/** An Array wrapper providing extra functionalities and more chaining opportunities */
export declare class ArrayWrapper<T extends ReadonlyArray<unknown>> {
    private _value;
    constructor(_value: T);
    private _isLiftWrapper;
    value(): T;
    private _clone;
    /**
     * Appends one item at the end of the Array.
     */
    append(item: T[number]): ArrayWrapper<T>;
    /**
     * Appends an Iterable of items at the end of the Array.
     */
    appendAll(items: Iterable<T[number]>): ArrayWrapper<T>;
    /**
     * Filters all the falsy elements out of this Array.
     * All occurences of false, null, undefined, 0, "" will be removed.
     */
    compact(): ArrayWrapper<ArrayOf<T, Compacted<T[number]>>>;
    /**
     * Counts the items satisfying a predicate.
     */
    count(predicate: (item: T[number], index: number) => boolean): number;
    /**
     * Maps this Array's items, unless void or undefined is returned, in which case the item is filtered.
     * This is effectively a `filter` + `map` combined in one.
     */
    collect<B>(iterator: (item: T[number], index: number) => B | undefined | void): ArrayWrapper<ArrayOf<T, B>>;
    /**
     * Creates an array without any duplicate item.
     * If a key function is passed, items will be compared based on the result of that function;
     * if not, they will be compared using strict equality.
     */
    distinct(getKey?: (item: T[number], index: number) => string | number): ArrayWrapper<T>;
    /**
     * Drops the first 'count' items from this Array.
     */
    drop(count: number): ArrayWrapper<T>;
    /**
     * Drops the last 'count' items from this Array.
     */
    dropRight(count: number): ArrayWrapper<T>;
    /**
     * Filters this array by aplying a predicate to all items and refine its type.
     */
    filter<A extends T[number]>(predicate: (item: T[number], index: number) => item is A): ArrayWrapper<ArrayOf<T, A>>;
    /**
     * Filters this array by aplying a predicate.
     */
    filter(predicate: (item: T[number], index: number) => boolean): ArrayWrapper<T>;
    /**
     * Returns the first element in this Array or undefined.
     */
    first(): T[number] | undefined;
    /**
     * Maps this Array to an Array of Array | ArrayWrapper using a mapper function then flattens it.
     */
    flatMap<B extends ReadonlyArray<any>>(fun: (item: T[number], index: number) => B): ArrayWrapper<B>;
    /**
     * Maps this Array to an Array of Array | ArrayWrapper using a mapper function then flattens it.
     */
    flatMap<B extends ReadonlyArray<any>>(fun: (item: T[number], index: number) => ArrayWrapper<B>): ArrayWrapper<B>;
    /**
     * Flattens this Array of Arrays.
     */
    flatten<A>(this: ArrayWrapper<ReadonlyArray<ReadonlyArray<A>>>): ArrayWrapper<ArrayOf<T, A>>;
    flatten<A>(this: ArrayWrapper<A[][]>): ArrayWrapper<ArrayOf<T, A>>;
    /**
     * Reduces this Array into a single value, using a starting value.
     */
    reduce<V>(startValue: V, func: (acc: V, value: T[number], index: number) => V): Lifted<V>;
    /**
     * Returns the item found at the provided index or undefined.
     */
    get(index: number): T[number] | undefined;
    /**
     * Creates a Map where keys are the results of running each element through a discriminator function.
     * The corresponding value of each key is an array of the elements responsible for generating the key.
     */
    groupBy<K extends string | number>(discriminator: (item: T[number], index: number) => K): MapWrapper<K, T, MapFromArray<T, K, T>>;
    /**
     * Creates a new Array where each sub array contains at most 'bySize' elements.
     */
    grouped(bySize: number): ArrayWrapper<T[]>;
    /**
     * Inserts an item at a specified index.
     */
    insert(index: number, item: T[number]): ArrayWrapper<T>;
    /**
     * Returns the item found at the last index or undefined.
     */
    last(): T[number] | undefined;
    /**
     * Maps this Array using a mapper function.
     */
    map<B>(fun: (item: T[number], index: number) => B): ArrayWrapper<ArrayOf<T, B>>;
    /**
     * Removes the item found at the specified index.
     */
    removeAt(index: number): ArrayWrapper<T>;
    /**
     * Reverses the Array.
     */
    reverse(): ArrayWrapper<T>;
    /**
     * Sorts the Array in ascending order, using one or more iterators specifying which field to compare.
     * For strings, localCompare is used.
     * The sort is stable if the browser uses a stable sort (all modern engines do)
     */
    sort(...fields: Array<SortOnField<T[number]>>): ArrayWrapper<T>;
    /**
     * Takes the first 'count' items from this Array.
     */
    take(count: number): ArrayWrapper<T>;
    /**
     * Takes the last 'count' items from this Array.
     */
    takeRight(count: number): ArrayWrapper<T>;
    /**
     * Converts this Array to a Set.
     */
    toSet(): SetWrapper<T[number], SetFromArray<T>>;
    /**
     * Updates an item at the specified index.
     */
    updateAt(index: number, updater: (item: T[number]) => Wrapper<T[number]>): ArrayWrapper<T>;
    /**
     * Updates an item at the specified index.
     */
    updateAt(index: number, updater: (item: T[number]) => T[number]): ArrayWrapper<T>;
    /**
     * Pipes this Array with an arbitrary transformation function.
     */
    pipe: typeof import("./lift").pipe;
}
export declare function setArrayPipe(_pipe: Pipe): void;
export declare function range(start: number, stop?: number, step?: number): ArrayWrapper<ReadonlyArray<number>>;
declare type SortOnField<T> = ((field: T) => string | null | undefined) | ((field: T) => number | null | undefined);
declare type Compacted<T> = T extends null | undefined | 0 | false ? never : T;
declare type SetFromArray<T extends ReadonlyArray<unknown>> = T extends Array<infer E> ? Set<E> : T extends ReadonlyArray<infer E> ? ReadonlySet<E> : never;
declare type ArrayOf<T extends ReadonlyArray<unknown>, ITEM> = T extends Array<any> ? Array<ITEM> : ReadonlyArray<ITEM>;
declare type MapFromArray<T extends ReadonlyArray<unknown>, K, V> = T extends Array<any> ? Map<K, V> : ReadonlyMap<K, V>;
export {};