@naturalcycles/js-lib/dist/array/sort.js

Standard library for universal (browser + Node.js) javascript

import { _stringMapValues, } from '../types.js';
class Comparators {
    /**
     * Good for numbers.
     */
    numericAsc(a, b) {
        return a - b;
    }
    numericDesc(a, b) {
        return b - a;
    }
    localeAsc(a, b) {
        return a.localeCompare(b);
    }
    localeDesc(a, b) {
        return -a.localeCompare(b);
    }
    by(mapper, opt = {}) {
        const mod = opt.dir === 'desc' ? -1 : 1;
        return (objA, objB) => {
            // This implementation may call mapper more than once per item,
            // but the benchmarks show no significant difference in performance.
            const a = mapper(objA);
            const b = mapper(objB);
            if (a > b)
                return mod;
            if (a < b)
                return -mod;
            return 0;
        };
    }
    updatedAsc(a, b) {
        return a.updated - b.updated;
    }
    updatedDesc(a, b) {
        return b.updated - a.updated;
    }
    createdAsc(a, b) {
        return a.created - b.created;
    }
    createdDesc(a, b) {
        return b.created - a.created;
    }
}
export const comparators = new Comparators();
/**
 * _sortBy([{age: 20}, {age: 10}], 'age')
 * // => [{age: 10}, {age: 20}]
 *
 * Same:
 * _sortBy([{age: 20}, {age: 10}], o => o.age)
 */
export function _sortBy(items, mapper, opt = {}) {
    return (opt.mutate ? items : [...items]).sort(comparators.by(mapper, opt));
}
/**
 * Like _stringMapValues, but values are sorted.
 */
export function _stringMapValuesSorted(map, mapper, dir = 'asc') {
    return _sortBy(_stringMapValues(map), mapper, { dir });
}