[英]Javascript merge object with nested properties
讓我們看看下面的例子:
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."
}
};
現在我想要的是:
以下是我期望的結果:
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."
}
};
我試過的:
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;
}
上面的函數合並但不知何故不嵌套屬性。
UPDATE & ANSWER得到它的工作,我忘記了通過第二個對象迭代,多么愚蠢。 感謝@AnthonyGrist
function mergeProperties(propertyKey, firstObject, secondObject) {
var propertyValue = firstObject[propertyKey];
if (typeof(propertyValue) === "object") {
return mergeNestedObjects(firstObject[propertyKey], secondObject[propertyKey]);
} else if (secondObject === undefined || 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;
}
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;
}
很老的問題,但可能很有用。 一點遞歸。
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);
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