数组分离

有这样一种需求，如何将一个数组，根据数组中的某一个键值，将这个原有数组， “分类”  组成一个新的数组？

话不多说，直入主题  ^ _ ^ !：

原数组：

oldArr = [{"cateName":"硬盘","cateIndex":0,"goodsId":"1","goodsAttr":"三星/机械硬盘"},
   {"cateName":"硬盘","cateIndex":0,"goodsId":"4","goodsAttr":"三星/固态硬盘"},
   {"cateName":"硬盘","cateIndex":0,"goodsId":"5","goodsAttr":"三星/机械硬盘"},
   {"cateName":"内存","cateIndex":1,"goodsId":"2","goodsAttr":"金士顿/DDR11"},
   {"cateName":"内存","cateIndex":1,"goodsId":"6","goodsAttr":"金士顿/DDR11"},
   {"cateName":"主板","cateIndex":2,"goodsId":"59","goodsAttr":"123"},
   {"cateName":"显示器","cateIndex":3,"goodsId":"64","goodsAttr":"123223"}];

期望结果：

newArr = [[{"cateName": "硬盘", "cateIndex": 0, "goodsId": "1", "goodsAttr": "三星/机械硬盘"},
　　　　　　{"cateName": "硬盘", "cateIndex": 0, "goodsId": "4", "goodsAttr": "三星/固态硬盘"},
　　　　　　{"cateName": "硬盘", "cateIndex": 0, "goodsId": "5", "goodsAttr": "三星/机械硬盘"}],
        [{"cateName": "内存", "cateIndex": 1, "goodsId": "2", "goodsAttr": "金士顿/DDR11"},
　　　　　　{"cateName": "内存", "cateIndex": 1, "goodsId": "6", "goodsAttr": "金士顿/DDR11"}],
        [{"cateName": "主板", "cateIndex": 2, "goodsId": "59", "goodsAttr": "123"}],
        [{"cateName": "显示器", "cateIndex": 3, "goodsId": "64", "goodsAttr": "123223"}]]


接下来，就是 magic time:

// 数组根据某一值分成多个数组
function likSeparateArr(arr, str) {
    var strArr = [];
    $.each(arr, function (i, v) {
        if ($.inArray(v[str], strArr) == -1) {
            strArr.push(v[str]);
        }
    });
    var newArr = [];
    $.each(strArr, function (i, v) {
        var childrenArr = [];
        $.each(arr, function (i2, v2) {
            if (v2[str] == v) {
                childrenArr.push(v2);
            }
        });
        newArr.push({
            parent: v,
            children: childrenArr
        })
    });
    return newArr;
}

最终结果如下：

[
    {
        "parent": "硬盘",
        "children": [
            {"cateName": "硬盘", "cateIndex": 0, "goodsId": "1", "goodsAttr": "三星/机械硬盘"},
            {"cateName": "硬盘", "cateIndex": 0, "goodsId": "4", "goodsAttr": "三星/固态硬盘"},
            {"cateName": "硬盘", "cateIndex": 0, "goodsId": "5", "goodsAttr": "三星/机械硬盘"}
        ]
    },
    {
        "parent": "内存",
        "children": [
            {"cateName": "内存", "cateIndex": 1, "goodsId": "2", "goodsAttr": "金士顿/DDR11"},
            {"cateName": "内存", "cateIndex": 1, "goodsId": "6", "goodsAttr": "金士顿/DDR11"}
        ]
    },
    {
        "parent": "主板",
        "children": [
            {"cateName": "主板", "cateIndex": 2, "goodsId": "59", "goodsAttr": "123"}
        ]
    },
    {
        "parent": "显示器",
        "children": [
            {"cateName": "显示器", "cateIndex": 3, "goodsId": "64", "goodsAttr": "123223"}
        ]
    }
]

有任何疑问或者建议，就给我留言吧！