javascript - 对照另一个数组检查数组项

Question

我正在尝试测试数组中的值，并根据该结果采取相应的行动，即，如果要测试的数组中不存在该项目，则将其添加到数组中。我已经在这上面花了太多时间，我真的需要一些帮助。

    function FilterItems(attrName, attrValue, priceMin, priceMax) {
        // check if item exists in filtered items
        for (var i = 0; i < adlet.item.length; i++) {  
            if (adlet.item[i][attrName] == attrValue) {
                var currentItem = adlet.item[i];
                if (filteredItems.length > 0) {
                    // console.log(filteredItems.length);
                    for (var x = 0; x < filteredItems.length; x++) {                       
                        if (filteredItems[x].OMSID == currentItem.OMSID) {  
                            // match found
                            break;           
                        } else {
                            // match not found, add to filtered items.
                            filteredItems.push(currentItem);
                        }
                    }          
                } else {
                    filteredItems.push(adlet.item[i]);
                    // console.log(filteredItems.length);
                }
            }
        }

Answer 1

您在每次迭代中都没有找到 currentItem。filteredItems.push(currentItem); 如果找不到则必须在循环后调用:

...

    var found = false; // new 'found' var = true if currentItem is found
    for (var x = 0; x < filteredItems.length; x++) {
        if (filteredItems[x].OMSID == currentItem.OMSID) {
            // match found
            found = true;
            break;
        }
    }

    // match not found, add to filtered items.
    if (!found) {
        filteredItems.push(currentItem);
    }

} else {
    filteredItems.push(adlet.item[i]);
    // console.log(filteredItems.length);
}

...