@gvray/eskit/lib/filter.js

A rich and colorful toolkit about typescript and javascript.

"use strict";
var __values = (this && this.__values) || function(o) {
    var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
    if (m) return m.call(o);
    if (o && typeof o.length === "number") return {
        next: function () {
            if (o && i >= o.length) o = void 0;
            return { value: o && o[i++], done: !o };
        }
    };
    throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
};
var __read = (this && this.__read) || function (o, n) {
    var m = typeof Symbol === "function" && o[Symbol.iterator];
    if (!m) return o;
    var i = m.call(o), r, ar = [], e;
    try {
        while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
    }
    catch (error) { e = { error: error }; }
    finally {
        try {
            if (r && !r.done && (m = i["return"])) m.call(i);
        }
        finally { if (e) throw e.error; }
    }
    return ar;
};
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * Filters elements of an array or object based on a callback function.
 * 根据回调函数过滤数组或对象的元素。
 *
 * @param collection - The array or object to filter / 要过滤的数组或对象
 * @param callback - The function to call for each element / 为每个元素调用的函数
 * @returns A new array or object with filtered elements / 包含过滤元素的新数组或对象
 *
 * @example
 * ```typescript
 * // Array filtering
 * const numbers = [1, 2, 3, 4, 5]
 * const evenNumbers = filter(numbers, (num) => num % 2 === 0)
 * console.log(evenNumbers) // [2, 4]
 *
 * const users = [
 *   { name: 'Alice', age: 25 },
 *   { name: 'Bob', age: 17 },
 *   { name: 'Charlie', age: 30 }
 * ]
 * const adults = filter(users, (user) => user.age >= 18)
 * console.log(adults) // [{ name: 'Alice', age: 25 }, { name: 'Charlie', age: 30 }]
 *
 * // Object filtering
 * const obj = { a: 1, b: 2, c: 3, d: 4, e: 5 }
 * const evenValues = filter(obj, (value) => value % 2 === 0)
 * console.log(evenValues) // { b: 2, d: 4 }
 *
 * const config = { debug: true, timeout: 5000, retries: 3, verbose: false }
 * const booleanSettings = filter(config, (value) => typeof value === 'boolean')
 * console.log(booleanSettings) // { debug: true, verbose: false }
 * ```
 *
 * @since 1.0.0
 */
var filter = function (collection, callback) {
    var e_1, _a;
    var filteredCollection = Array.isArray(collection) ? [] : {};
    try {
        for (var _b = __values(Object.entries(collection)), _c = _b.next(); !_c.done; _c = _b.next()) {
            var _d = __read(_c.value, 2), indexOrKey = _d[0], value = _d[1];
            if (callback(value, indexOrKey, collection)) {
                if (Array.isArray(filteredCollection)) {
                    filteredCollection.push(value);
                }
                else {
                    filteredCollection[indexOrKey] = value;
                }
            }
        }
    }
    catch (e_1_1) { e_1 = { error: e_1_1 }; }
    finally {
        try {
            if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
        }
        finally { if (e_1) throw e_1.error; }
    }
    return filteredCollection;
};
exports.default = filter;
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