我正在使用可以具有子类别对象数组的类别对象数组。棘手的部分是这个嵌套数据的深度是未知的(并且可以改变)。(参见底部的示例。)我想要做的是向类别对象返回一个“轨迹”,但我遇到了各种各样的困难。
理想情况下findCategory('b4')
会返回:(['c1', 'd2', 'd3', 'b4']
参见示例)。
我认为我的问题是我无法正确打破由递归引起的嵌套循环。有时我会在我的追踪中获得额外的类别,或者当我认为我已经突破时,一些更深层次的嵌套类别最终会出现在追踪中。
一个结果可能如下所示。显然,它并没有杀死 b4 的循环,我不确定为什么会发现两次结果。
b4
FOUND
["c1", "d2", "d3", "b4"]
e2
FOUND
["c1", "d2", "d3", "b4", "e2"]
如果您还可以向我展示 underscore.js 版本,则可以加分。
JSFiddle 链接在这里...
// Start function
function findCategory(categoryName) {
var trail = [];
var found = false;
function recurse(categoryAry) {
for (var i=0; i < categoryAry.length; i++) {
console.log(categoryAry[i].category);
trail.push(categoryAry[i].category);
// Found the category!
if ((categoryAry[i].category === categoryName) || found) {
console.log('FOUND');
found = true;
console.log(trail);
break;
// Did not match...
} else {
// Are there children / sub-categories? YES
if (categoryAry[i].children.length > 0) {
console.log('recurse');
recurse(categoryAry[i].children);
// NO
} else {
trail.pop();
if (i === categoryAry.length - 1) {
trail.pop();
}
}
}
}
}
return recurse(catalog);
}
console.clear();
console.log(findCategory('b4'));
例如,数组类别对象,具有嵌套的类别对象数组。假设嵌套深度未知。
var catalog = [
{
category:"a1",
children:[
{
category:"a2",
children:[]
},
{
category:"b2",
children:[
{
category:"a3",
children:[]
},
{
category:"b3",
children:[]
}
]
},
{
category:"c2",
children:[]
}
]
},
{
category:"b1",
children:[]
},
{
category:"c1",
children:[
{
category:"d2",
children:[
{
category:"c3",
children:[]
},
{
category:"d3",
children:[
{
category:"a4",
children:[]
},
{
category:"b4",
children:[]
},
{
category:"c4",
children:[]
},
{
category:"d4",
children:[]
}
]
}
]
},
{
category:"e2",
children:[
{
category:"e3",
children:[]
}
]
}
]
}
];