Javascriptが

Question

は、以下の例を見てみましょう、ネストされたプロパティを持つオブジェクトをマージ：

var ref = { 
    "fullName": { 
     "rules": { 
      "type": "string", 
      "minLength": 4, 
      "maxLength": 64 
     }, 
     "description": "Full name of a user." 
    } 
}; 

var user = { 
    "fullName": { 
     "rules": { 
      "required": true, 
      "maxLength": 128 
     }, 
     "message": "You have submitted a wrong full name." 
    } 
}; 

は今、私が欲しいのはこれです：

1. マージは&プロパティオブジェクト。
2. 彼らが既に設定されている場合（maxLengthの）以下

は、私が期待した結果である第二の目的のプロパティを保持：

var res = { 
    "fullName": { 
     "rules": { 
      "required": true, 
      "maxLength": 128 
      "type": "string", 
      "minLength": 4 
     }, 
     "description": "Full name of a user.", 
     "message": "You have submitted a wrong full name." 
    } 
}; 

私が試してみました何：

function mergeNestedObjects(firstObject, secondObject) { 
    var finalObject = {}; 

    for (var propertyKey in firstObject) { 
     var propertyValue = firstObject[propertyKey]; 

     if (typeof(propertyValue) === "object") { 
      finalObject[propertyKey] = mergeNestedObjects(firstObject[propertyKey], secondObject[propertyKey]); 
     } else if (secondObject[propertyKey] === undefined) { 
      finalObject[propertyKey] = firstObject[propertyKey]; 
     } else { 
      finalObject[propertyKey] = secondObject[propertyKey]; 
     } 
    } 

    return finalObject; 
} 

を

上記の関数はマージしますが、何らかの形でプロパティをネストしません。 & ANSWERはそれが働いてしまった

UPDATEどのようにダム、私は、第二の目的によってすぎitterate忘れてしまいました。おかげで

function mergeProperties(propertyKey, firstObject, secondObject) { 
    var propertyValue = firstObject[propertyKey]; 

    if (typeof(propertyValue) === "object") { 
     return mergeNestedObjects(firstObject[propertyKey], secondObject[propertyKey]); 
    } else if (secondObject[propertyKey] === undefined) { 
     return firstObject[propertyKey]; 
    } 

    return secondObject[propertyKey]; 
} 

function mergeNestedObjects(firstObject, secondObject) { 
    var finalObject = {}; 

    // Merge first object and its properties. 
    for (var propertyKey in firstObject) { 
     finalObject[propertyKey] = mergeProperties(propertyKey, firstObject, secondObject); 
    } 

    // Merge second object and its properties. 
    for (var propertyKey in secondObject) { 
     finalObject[propertyKey] = mergeProperties(propertyKey, secondObject, firstObject); 
    } 

    return finalObject; 
} 

Answer 1

function mergeProperties(propertyKey, firstObject, secondObject) { 
    var propertyValue = firstObject[propertyKey]; 

    if (typeof(propertyValue) === "object") { 
     return mergeNestedObjects(firstObject[propertyKey], secondObject[propertyKey]); 
    } else if (secondObject[propertyKey] === undefined) { 
     return firstObject[propertyKey]; 
    } 

    return secondObject[propertyKey]; 
} 

function mergeNestedObjects(firstObject, secondObject) { 
    var finalObject = {}; 

    // Merge first object and its properties. 
    for (var propertyKey in firstObject) { 
     finalObject[propertyKey] = mergeProperties(propertyKey, firstObject, secondObject); 
    } 

    // Merge second object and its properties. 
    for (var propertyKey in secondObject) { 
     finalObject[propertyKey] = mergeProperties(propertyKey, secondObject, firstObject); 
    } 

    return finalObject; 
} 

Answer 2

かなり古い質問を@AnthonyGristするが、便利です。 再帰の少し。

function mergeObjects(og, so) { 
    for (var key in so) { 
     if (typeof (og[key]) === 'object') { 
      mergeObjects(og[key], so[key]); 
     } else { 
      if (og[key] || typeof (og[key]) === 'boolean') { 
       og[key] = so[key]; 
      } 
     } 
    } 
    return og; 
} 

mergeObjects(ref, user);