ut2/lib/intersection.js

一个现代 JavaScript 实用工具库。[点击查看在线文档]。

'use strict';

var eq = require('./eq.js');
var identity = require('./identity.js');
var createIteratee = require('./internals/createIteratee.js');
var isArray = require('./isArray.js');

function intersection(array, other, iteratee, strictCheck) {
    if (iteratee === void 0) { iteratee = identity; }
    if (strictCheck === void 0) { strictCheck = false; }
    if (!isArray(array) || !isArray(other)) {
        return [];
    }
    var internalIteratee = createIteratee(iteratee);
    var caches = [];
    return array.filter(function (item) {
        var current = internalIteratee(item);
        if (other.findIndex(function (value) { return eq(internalIteratee(value), current, strictCheck); }) !== -1 && !caches.includes(current)) {
            caches.push(current);
            return true;
        }
        return false;
    });
}

module.exports = intersection;