问如何使用javascript中的嵌套对象来平平对象

EN

var enrollment = {
user: {
    id: 'string',
    name: 'string'
},
finished: 'boolean',
path: 'boolean'
}

var enrollment2 = {
user: {
    id: 'string',
    name: 'string'
},
test: {
    test1: {
        test2: {
            val0:'val0',
            test4: { //3rd level nested object for example
                val1: 'val1',
                val2: 'val2'
            }
        }
    }
},
finished: 'boolean',
path: 'boolean'
}

const flat = (obj, out) => {
    Object.keys(obj).forEach(key => {
        if (typeof obj[key] == 'object') {
            out = flat(obj[key], out) //recursively call for nesteds
        } else {
            out[key] = obj[key] //direct assign for values
        }

    })
    return out
}

console.log(flat(enrollment, {}))
console.log(flat(enrollment2, {}))

const flattenObject = (obj, parentKey = '') => {
    if (parentKey !== '') parentKey += '.';
    let flattened = {};
    Object.keys(obj).forEach((key) => {
        if (typeof obj[key] === 'object' && obj[key] !== null) {
            Object.assign(flattened, flattenObject(obj[key], parentKey + key))
        } else {
            flattened[parentKey + key] = obj[key]
        }
    })
    return flattened;
}

var test = {
    foo: 'bar',
    some: 'thing',
    father: {
        son1: 'son1 value',
        son2: {
            grandchild: 'grandchild value',
            duplicatedKey: 'note this is also used in first level',
        },
    },
    duplicatedKey: 'note this is also used inside son2',
}

let flat = flattenObject(test);
console.log(flat);

// how to access the flattened keys:
let a = flat['father.son2.grandchild'];
console.log(a);

var enrollment = {
    user: {
        id: 'string',
        name: 'string',
    },
    fineshed: true,
    path: false,
};

var user = Object.assign(enrollment.user);
user.fineshed = enrollment.fineshed;
user.path = enrollment.path;

var enrollment = {
	user: {
		id: 'string',
		name: 'string',
	},
	fineshed: true,
	path: false,
};

const flatten = (object) => {
	let value = {};
	for (var property in object) {
		if (typeof object[property] === 'object') {
			for (var p in object[property]) {
				value[p] = object[property][p];
			}
		} else {
			value[property] = object[property];
		}
	}

	return value;
};

let user = flatten(enrollment);

console.log(user);