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- import type { ValueOf } from '../../types/util';
- export const DECIMAL_UNITS = Object.freeze({
- ONE: 1,
- TEN: 10,
- HUNDRED: 100,
- THOUSAND: 1_000,
- MILLION: 1_000_000,
- BILLION: 1_000_000_000,
- TRILLION: 1_000_000_000_000,
- });
- export type DecimalUnits = ValueOf<typeof DECIMAL_UNITS>;
- const TEN_THOUSAND = DECIMAL_UNITS.THOUSAND * 10;
- const TEN_MILLIONS = DECIMAL_UNITS.MILLION * 10;
- export type ShortNumber = [number, DecimalUnits, 0 | 1]; // Array of: shorten number, unit of shorten number and maximum fraction digits
- /**
- * @param sourceNumber Number to convert to short number
- * @returns Calculated short number
- * @example
- * shortNumber(5936);
- * // => [5.936, 1000, 1]
- */
- export function toShortNumber(sourceNumber: number): ShortNumber {
- if (sourceNumber < DECIMAL_UNITS.THOUSAND) {
- return [sourceNumber, DECIMAL_UNITS.ONE, 0];
- } else if (sourceNumber < DECIMAL_UNITS.MILLION) {
- return [
- sourceNumber / DECIMAL_UNITS.THOUSAND,
- DECIMAL_UNITS.THOUSAND,
- sourceNumber < TEN_THOUSAND ? 1 : 0,
- ];
- } else if (sourceNumber < DECIMAL_UNITS.BILLION) {
- return [
- sourceNumber / DECIMAL_UNITS.MILLION,
- DECIMAL_UNITS.MILLION,
- sourceNumber < TEN_MILLIONS ? 1 : 0,
- ];
- } else if (sourceNumber < DECIMAL_UNITS.TRILLION) {
- return [sourceNumber / DECIMAL_UNITS.BILLION, DECIMAL_UNITS.BILLION, 0];
- }
- return [sourceNumber, DECIMAL_UNITS.ONE, 0];
- }
- /**
- * @param sourceNumber Original number that is shortened
- * @param division The scale in which short number is displayed
- * @returns Number that can be used for plurals when short form used
- * @example
- * pluralReady(1793, DECIMAL_UNITS.THOUSAND)
- * // => 1790
- */
- export function pluralReady(
- sourceNumber: number,
- division: DecimalUnits | null,
- ): number {
- if (division == null || division < DECIMAL_UNITS.HUNDRED) {
- return sourceNumber;
- }
- const closestScale = division / DECIMAL_UNITS.TEN;
- return Math.trunc(sourceNumber / closestScale) * closestScale;
- }
- export function roundTo10(num: number): number {
- return Math.round(num * 0.1) / 0.1;
- }
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