quantitivecalc/dist/ListUtils/findExtremesInColumn.js

A TypeScript library providing advanced quantitative finance functions for risk analysis, performance metrics, and technical indicators. (Currently in development)

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = findExtremesInColumn;
/**
 * Finds the items with the minimum and maximum values in a specified column of an array of objects.
 *
 * @template T - The type of objects in the list.
 * @template K - The key of the column to compare, must be a key of T with comparable values.
 * @param list - The array of objects to search.
 * @param columnName - The key of the column to find extremes in.
 * @returns An object containing the items with the minimum and maximum values in the specified column.
 *          If the list is empty, both `min` and `max` will be `undefined`.
 */
function findExtremesInColumn(list, columnName) {
    if (list.length === 0) {
        return { min: undefined, max: undefined };
    }
    let min = list[0];
    let max = list[0];
    for (const item of list) {
        if (item[columnName] < min[columnName]) {
            min = item;
        }
        if (item[columnName] > max[columnName]) {
            max = item;
        }
    }
    return { min, max };
}