在嵌套数组深处按键查找 [英] Find by key deep in a nested array

问题描述

假设我有一个对象:

[
    {
        'title': "some title"
        'channel_id':'123we'
        'options': [
                    {
                'channel_id':'abc'
                'image':'http://asdasd.com/all-inclusive-block-img.jpg'
                'title':'All-Inclusive'
                'options':[
                    {
                        'channel_id':'dsa2'
                        'title':'Some Recommends'
                        'options':[
                            {
                                'image':'http://www.asdasd.com'                                 'title':'Sandals'
                                'id':'1'
                                'content':{
                                     ...

我想找到一个id为1的对象.是否有类似这样的功能?我可以使用Underscore的_.filter方法，但是我必须从顶部开始然后向下过滤.

I want to find the one object where the id is 1. Is there a function for something like this? I could use Underscore's _.filter method, but I would have to start at the top and filter down.

推荐答案

递归是您的朋友.我更新了该函数以说明属性数组:

Recursion is your friend. I updated the function to account for property arrays:

function getObject(theObject) {
    var result = null;
    if(theObject instanceof Array) {
        for(var i = 0; i < theObject.length; i++) {
            result = getObject(theObject[i]);
            if (result) {
                break;
            }   
        }
    }
    else
    {
        for(var prop in theObject) {
            console.log(prop + ': ' + theObject[prop]);
            if(prop == 'id') {
                if(theObject[prop] == 1) {
                    return theObject;
                }
            }
            if(theObject[prop] instanceof Object || theObject[prop] instanceof Array) {
                result = getObject(theObject[prop]);
                if (result) {
                    break;
                }
            } 
        }
    }
    return result;
}

更新了jsFiddle: http://jsfiddle.net/FM3qu/7/

updated jsFiddle: http://jsfiddle.net/FM3qu/7/

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