flo-utils/es/filter.js

some utils

function _createForOfIteratorHelper(o, allowArrayLike) { var it; if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var normalCompletion = true, didErr = false, err; return { s: function s() { it = o[Symbol.iterator](); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it.return != null) it.return(); } finally { if (didErr) throw err; } } }; }

function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }

/**
 * @link https://github.com/lodash/lodash/blob/es/filter.js， 目前只支持数组类型过滤，需要对`arrayLink`进行过滤，使用_.filter()
 */

/**
 * @name filter, 扁平数据过滤
 * @param {*} collection
 * @param {function} func return boolean
 */
import isArray from './isArray';
import isObject from './isObject';
import { consoleWran } from './warn/util';

function filter(collection, func) {
  var result = null;

  if (typeof func !== 'function') {
    consoleWran('second param is object or array !');
    return [];
  }

  if (isArray(collection)) {
    result = collection.filter(function (item, i) {
      return func(item, i);
    });
  } else if (isObject(collection)) {
    var keysArr = Object.keys(collection);
    var keysFilter = keysArr.filter(function (key) {
      return func(collection[key], key);
    });
    result = {};

    var _iterator = _createForOfIteratorHelper(keysFilter),
        _step;

    try {
      for (_iterator.s(); !(_step = _iterator.n()).done;) {
        var key = _step.value;
        var keyVal = collection[key];

        if (typeof keyVal === 'string') {
          keyVal = keyVal.trim();
        }

        result[key] = keyVal;
      }
    } catch (err) {
      _iterator.e(err);
    } finally {
      _iterator.f();
    }
  } else {
    consoleWran('1st param is object or array !');
    return [];
  }

  return result;
}

export default filter;