7

我正在使用 Angular JS 及其示例之一：http: //jsfiddle.net/furf/EJGHX/

我需要在更新功能发生时获取数据并在发送到服务器之前为其添加一些值。（如果用 Angular 而不是 js 来做这个会更好让我知道）

我正在尝试获取“parentid”和“index”并更新孩子。

这是我正在循环的数据

{
    "children": [{
        "id": "5",
        "parentid": "0",
        "text": "Device Guides",
        "index": "1",
        "children": [{
            "id": "10",
            "index": "0",
            "text": "Grandstream GXP-21XX"
        }, {
            "id": "11",
            "index": "1",
            "text": "Polycom Soundstation/Soundpoint"
        }, {
            "id": "23",
            "index": "2",
            "text": "New Polycom"
        }]
    }, {
        "id": "6",
        "parentid": "0",
        "text": "Pre-Sales Evaluation",
        "index": "0",
        "children": []
    }, {
        "id": "7",
        "parentid": "0",
        "text": "Router Setup Guides",
        "index": "2",
        "children": [{
            "id": "9",
            "index": "0",
            "text": "Sonicwall"
        }, {
            "id": "12",
            "index": "1",
            "text": "Cisco"
        }]
    }, {
        "id": "9",
        "parentid": "7",
        "text": "Sonicwall",
        "index": "0",
        "children": []
    }, {
        "id": "10",
        "parentid": "5",
        "text": "Grandstream GXP-21XX",
        "index": "0",
        "children": []
    }, {
        "id": "11",
        "parentid": "5",
        "text": "Polycom Soundstation/Soundpoint",
        "index": "1",
        "children": []
    }, {
        "id": "12",
        "parentid": "7",
        "text": "Cisco",
        "index": "1",
        "children": []
    }, {
        "id": "15",
        "parentid": "0",
        "text": "Post-Sales Implementation Check List",
        "index": "7",
        "children": [{
            "id": "16",
            "index": "0",
            "text": "Porting and New Number Details"
        }, {
            "id": "18",
            "index": "1",
            "text": "Partner Setup"
        }, {
            "id": "19",
            "index": "2",
            "text": "test"
        }, {
            "id": "21",
            "index": "3",
            "text": "test"
        }]
    }, {
        "id": "16",
        "parentid": "15",
        "text": "Porting and New Number Details",
        "index": "0",
        "children": []
    }, {
        "id": "18",
        "parentid": "15",
        "text": "Partner Setup",
        "index": "1",
        "children": []
    }, {
        "id": "19",
        "parentid": "15",
        "text": "test",
        "index": "2",
        "children": []
    }, {
        "id": "20",
        "parentid": "0",
        "text": "test",
        "index": "11",
        "children": []
    }, {
        "id": "21",
        "parentid": "15",
        "text": "test",
        "index": "3",
        "children": []
    }, {
        "id": "23",
        "parentid": "5",
        "text": "New Polycom",
        "index": "2",
        "children": []
    }, {
        "id": "24",
        "parentid": "0",
        "text": "Test Markup",
        "index": "14",
        "children": []
    }, {
        "id": "25",
        "parentid": "0",
        "text": "test",
        "index": "15",
        "children": []
    }]
}

这就是我目前循环遍历它的方式，但它只获得第一个维度

for (i = 0, l = data.length; i < l; i++) {
    parentid = data[i].id == null ? '0' : data[i].id;
    data[i].index = i;
    if (data[i].children) {
        if (data[i].children.length > 0) {
            for (q = 0, r = data[i].children.length; q < r; q++) {
                data[i].children[q].parentid = parentid;
                data[i].children[q].index = q;
            }
        }
    }
}

我在另一个小提琴上找到了这个，但我不知道如何获取 parentid 或索引

$.each(target.children, function(key, val) { recursiveFunction(key, val) });

    function recursiveFunction(key, val) {
        actualFunction(key, val);
        var value = val['children'];
        if (value instanceof Object) {
            $.each(value, function(key, val) {
                recursiveFunction(key, val)
            });
        }

    }


function actualFunction(key, val) {}
4

2 回答 2

7

如果我对您的理解正确，您希望每个“孩子”都有一个parentID（由其父级定义；0否则）和一个index（基于其在同级集中的位置）。

function normalize(parent) {
    if (parent && parent.children) {
        for (var i = 0, l = parent.children.length; i < l; ++i) {
            var child = parent.children[i];
            child.index = i;
            if (!child.parentId) child.parentId = parent.id || '0';
            normalize(child);
        }
    }
}

normalize(data);
于 2013-04-17T14:05:50.280 回答
3

Recursion is calling function inside the same function. Your sample is not a recursion at all;

function runRecursive(input) {
    for (var i = 0, l = input.length; i < l; i++) {
        var current = input[i];

        parentid = current.id == null ? '0' : current.id;
        current.index = i;
        if (current.children && current.children.length > 0) {
            runRecursive(current.children);
        };
    };
};

runRecursive(data.children);

Also you should define i and l with var keyword, otherwise it will be located in window context and recursion logic will broken. Though I don't get what is parentid variable for and why it defined outside visible code.

于 2013-04-17T14:02:10.723 回答