import type { TypedArray } from 'three';
export type ArrayToItemFunction<T> = (array: Array<T>) => T;
export declare function range(start: number, end: number, step: number, target: number[]): number[];
export declare function rangeWithEnd(end: number): number[];
export declare function rangeStartEnd(start: number, end: number): number[];
export declare function arrayUniq<T>(array: Array<T>, target: Array<T>): Array<T>;
export declare function sampleIndex(array: Array<any>, seed: number): number;
export declare function sample<T>(array: Array<T>, seed: number): T | undefined;
export declare function spliceSample<T>(array: Array<T>, seed: number): T | undefined;
export declare function uniqWithoutPreservingOrder<T>(array: Array<T>, target: Array<T>): Array<T>;
export declare function arrayCompact<T>(array: Readonly<Array<T | null | undefined>>, target: Array<T>): Array<T>;
export declare function arrayMin<T>(array: Array<T>): T;
export declare function arrayMax<T>(array: Array<T>): T;
export declare function arraySum(array: number[]): number;
export declare function arrayChunk<T>(array: Array<T>, chunkSize: number): Array<Array<T>>;
export declare function arrayUnion<T>(array0: Array<T>, array1: Array<T>, target: Array<T>): Array<T>;
export declare function arrayIntersection<T>(array0: Array<T>, array1: Array<T>, target: Array<T>): Array<T>;
export declare function arrayDifference<T>(array0: Array<T>, array1: Array<T>, target: Array<T>): Array<T>;
export declare function arrayXOR<T>(array0: Array<T>, array1: Array<T>, target: Array<T>): Array<T>;
export declare function arrayToSet<T>(array: Array<T>, target: Set<T>): Set<T>;
export declare function arrayIsEqual<T extends number | string>(array0: Array<T>, array1: Array<T>): boolean;
export declare function arraySortBy<T, K extends number | string>(array: Array<T>, callback: (e: T) => K): Array<T>;
export declare function arrayShallowClone<T>(array: Array<T>): Array<T>;
export declare function arrayMap<T, U>(array: Readonly<Array<T>>, callback: (e: T) => U, target: Array<U>): Array<U>;
export declare function arrayAverage(array: number[]): number;
export declare class ArrayUtils {
    static shallowClone: typeof arrayShallowClone;
    static min: typeof arrayMin;
    static max: typeof arrayMax;
    static sum: typeof arraySum;
    static compact: typeof arrayCompact;
    static uniq: typeof arrayUniq;
    static uniqWithoutPreservingOrder: typeof uniqWithoutPreservingOrder;
    static chunk: typeof arrayChunk;
    static union: typeof arrayUnion;
    static intersection: typeof arrayIntersection;
    static toSet: typeof arrayToSet;
    static isEqual: typeof arrayIsEqual;
    static sortBy: typeof arraySortBy;
    static range: typeof range;
}
export declare function arrayPushItems<T>(srcArray: Readonly<Array<T>>, target: Array<T>): void;
export declare function arrayCopy<T>(srcArray: Readonly<Array<T> | ArrayLike<T>>, targetArray: Array<T>): void;
export declare function typedArrayCopy<T1 extends TypedArray, T2 extends TypedArray>(srcArray: Readonly<T1>, targetArray: T2): T2;