javascript - 获取树列表的级别 - JavaScript

Question

我有一个 javascript 函数，可以将平面树列表转换为多维数组。我希望此函数还为每个项目添加一个 tree_level 属性。

    function getNestedChildren(arr, parent) {
    var out = []
    for (var i in arr) {    
            if (arr[i].headerId == parent) {
                var children = getNestedChildren(arr, arr[i].workID)

                if (children.length) {
                    arr[i].children = children
                }
                out.push(arr[i])
            }
    }
    return out
}

Answer 1

添加树级参数:

function getNestedChildren(arr, parent, level) {
    var out = []
    for (var i in arr) {  
            if (arr[i].headerId == parent) {
                arr[i].level = level;

                var children = getNestedChildren(arr, arr[i].workID, level + 1)

                if (children.length) {
                    arr[i].children = children
                }
                out.push(arr[i])
            }
    }
    return out
}