import { avg } from "./avg.js";
import { count } from "./count.js";
import { first } from "./first.js";
import { group } from "./group.js";
import { last } from "./last.js";
import { max } from "./max.js";
import { min } from "./min.js";
import { sum } from "./sum.js";
/**
 * Collection of built-in array utility functions for numerical and statistical operations.
 * Each function handles null and undefined values gracefully.
 * @example
 * import { builtIns } from './builtIns.js';
 *
 * const data = [1, null, 3, 2];
 * builtIns.sum(data);  // Returns 6
 * builtIns.avg(data);  // Returns 2
 */
export declare const builtIns: {
    /** Calculate sum of non-null numbers in array */
    sum: typeof sum;
    /** Count non-null/undefined elements in array */
    count: typeof count;
    /** Calculate average of non-null numbers in array */
    avg: typeof avg;
    /** Get first non-null/undefined element in array */
    first: typeof first;
    /** Get last non-null/undefined element in array */
    last: typeof last;
    /** Find minimum value among non-null/undefined numbers in array */
    min: typeof min;
    /** Find maximum value among non-null/undefined numbers in array */
    max: typeof max;
    /** Return the aggregation group */
    group: typeof group;
};
/**
 * Set containing valid built-in function names.
 * Used for validating function names and checking available operations.
 * @example
 * const isValidFunction = validBuiltIns.has('sum');  // Returns true
 * const isInvalidFunction = validBuiltIns.has('median');  // Returns false
 */
export declare const validBuiltIns: Set<string>;