/**
 * Interface for all collections
 */
export interface ICollection<A> {
    /**
     * Converts the collection into an array
     */
    asArray: A[];
    /**
     * Checks if the collection is empty or not. Returns true if the collection is empty.
     */
    isEmpty: boolean;
    /**
     * Filters out the values from the collection based on the passed predicate
     */
    filter(F: (A: A) => boolean): ICollection<A>;
    /**
     * Converts a collection into a value
     */
    fold<B>(seed: B, ab: (a: A, b: B) => B): B;
    /**
     * Converts an [[ICollection]] of type `A` to an [[ICollection]] of type `B`
     */
    map<B>(ab: (a: A) => B): ICollection<B>;
}