export declare const isNumber: <T>(a: T) => boolean;
export declare const isFunction: <T>(a: T) => boolean;
export declare const isUndefined: <T>(a: T) => boolean;
export declare const isNil: <T>(a: T) => boolean;
export declare const isString: <T>(a: T) => boolean;
export declare const isArray: <T>(a: T) => boolean;
export declare const isObject: <T>(a: T) => boolean;
export declare const isAClassInstance: <T>(a: T) => boolean;
export declare const isPlainObject: <T>(a: T) => boolean;
export declare const cloneDeep: <T>(obj: T, stack?: Map<any, any>) => T;
export declare const merge: <T, K>(obj1: T, obj2: K, visited?: Map<any, any>) => T & K;
export declare const isBetween: (num: number, min: number, max: number) => boolean;
export declare const getInnerDimensions: (node: HTMLElement) => {
    width: number;
    height: number;
};
export declare const isEqual: (a?: unknown | null, b?: unknown | null, visited?: Set<any>) => boolean;
/**
 * Formats a number with optional prefix, suffix, and precision.
 * @param value - The number to format.
 * @param prefix - The prefix to include before the formatted number. Default is an empty string.
 * @param suffix - The suffix to include after the formatted number. Default is undefined.
 * @param precision - The number of decimal places to include. Default is undefined.
 * @returns The formatted number as a string.
 */
export declare const defaultFormatter: (value: number, prefix?: string, suffix?: string, precision?: number) => string;
/**
 * Maps data points to intervals using binary search with O(n log m) complexity
 *
 * @param data Data points to map to intervals
 * @param intervals All intervals as [start, end] pairs
 * @param validIntervals Subset of intervals to consider (defaults to all intervals)
 * @param bandIntervals Used to determine the last interval boundary
 * @returns Array of counts for each interval in the original intervals array
 */
export declare function mapDataToIntervals<T extends number>(data: T[], intervals: [T, T][], validIntervals?: [T, T][], bandIntervals?: T[]): number[];
/**
 * Generates band intervals based on data extent and configuration
 *
 * @param extent - The data extent as [min, max]
 * @param barCount - Number of bars/intervals to generate
 * @param dataStep - Optional fixed step size between intervals
 * @returns Array of interval boundary points
 */
export declare function generateBandIntervals(extent: [number | Date, number | Date], barCount: number, dataStep?: number): number[];
/**
 * Maps raw data to bar format for visualization components
 *
 * @param data - Array of numeric data points
 * @param boundaries - Array of boundary points for intervals
 * @param currentSelection - Optional current selection range as [start, end]
 * @param isHighlighted - Whether this is for highlighted data
 * @param isNumeric - Whether to return numeric values or convert to Date
 * @returns Array of bar data objects with ranges and counts
 */
export declare function mapDataToBars(data: number[], boundaries: number[], currentSelection?: [number | Date, number | Date], isHighlighted?: boolean, isNumeric?: boolean): Array<{
    rangeStart: number | Date;
    rangeEnd: number | Date;
    count: number;
}>;