JSONデータをJavaScriptの3レベル多次元配列に変換するのに助けが必要です

Question

JSONデータをjavascriptの3レベル多次元配列に変換する際に助けが必要です。私の私はJSON形式で検索がこのようなコード：

[ 
{'City':'Philadelphia','State':'Pennsylvania','Country':'United States'}, 
{'City':'Pittsburgh','State':'Pennsylvania','Country':'United States'}, 
{'City':'Harrisburg','State':'Pennsylvania', 'Country':'United States'}, 
{'City':'Sacramento', 'State':'California', 'Country':'United States'}, 
{'City':'Fremont', 'State':'California', 'Country':'United States'}, 
{'City':'Los Angeles', 'State':'California','Country': 'United States'}, 
{'City':'Sydney', 'State':'New South Wales', 'Country':'Australia'}, 
{'City':'Melbourne', 'State':'Victoria', 'Country':'Australia'} 
] 

しかし、私はこの形式でそれを必要とする：

$scope.countries = { 
    'United States': 
    { 
     'Pennsylvania': ['Philadelphia', 'Pittsburgh', 'Harrisburg'], 
     'California': ['Sacramento', 'Fremont', 'Los Angeles'] 
    }, 
    'Australia': 
    { 
     'New South Wales': ['Sydney'], 
     'Victoria': ['Melbourne'] 
    } 
}; 

Answer 1

データが伝わってくるどのように私は強くあなたが変更助言します。つまり、オブジェクトブラケットの代わりに配列ブラケットを入力するという意味で、私はあなたの質問にJSBinソリューションを提供しました。

https://jsbin.com/qaxubigija/edit?js,console

function dataParse() { 

    var data = [ 
    [ 'Philadelphia','Pennsylvania','United States'],  
    ['Pittsburgh','Pennsylvania','United States'], 
    ['Harrisburg','Pennsylvania', 'United States'], 
    ['Sacramento', 'California', 'United States'], 
    ['Fremont', 'California', 'United States'], 
    ['Los Angeles', 'California', 'United States'], 
    ['Sydney', 'New South Wales', 'Australia'], 
    ['Melbourne', 'Victoria', 'Australia'] 
    ]; 

    var newObject = {}; 
    for(var i = 0; i < data.length; i++) { 

    // create your references 
    var currentNode = data[i], 
     city = currentNode[0], 
     state = currentNode[1], 
     country = currentNode[2]; 

    // check that the country property exists 
    // create if it does not exist 
    if(typeof newObject[country] == 'undefined'){ 
     newObject[country] = {}; 
    } 

    // check that the state property exists 
    // create if it does not exist 
    if(typeof newObject[country][state] == 'undefined'){ 
     newObject[country][state] = []; 
    }  

    // push city to the proper array 
    newObject[country][state].push(city); 

    } 

    console.log(newObject); 

} 

dataParse(); 

Answer 2

だから、それはあなたにJSONを与えるために、このようになります

Plunkerたい：http://plnkr.co/edit/Nx4hrAex8JCCbnYG5X3t?p=preview

EDIT新しいフォーマットで動作するように編集された

を。

var original = [ 
{'City':'Philadelphia','State':'Pennsylvania','Country':'United States'}, 
{'City':'Pittsburgh','State':'Pennsylvania','Country':'United States'}, 
{'City':'Harrisburg','State':'Pennsylvania', 'Country':'United States'}, 
{'City':'Sacramento', 'State':'California', 'Country':'United States'}, 
{'City':'Fremont', 'State':'California', 'Country':'United States'}, 
{'City':'Los Angeles', 'State':'California','Country': 'United States'}, 
{'City':'Sydney', 'State':'New South Wales', 'Country':'Australia'}, 
{'City':'Melbourne', 'State':'Victoria', 'Country':'Australia'} 
] 
    var json = {}; 
    for(var i in original){ 
    var country = original[i].Country; 
    var state = original[i].State; 
    var city = original[i].City; 
    var obj = {}; 

    if(!json.hasOwnProperty(country)){ 
     obj[state] = [city]; 
     json[country] = obj; 
    } 
    else if(json[country].hasOwnProperty(state)){ 
     json[country][state].push(city); 
    } 
    else if(!json[country].hasOwnProperty(state)){ 
     json[country][state] = [city]; 
    } 
    }