从对象中删除关键帧的优化方法是什么

Question

我有一个从JSON对象或对象数组中删除多个键的用例。下面是我的代码。如果有人对此有更优化的方法，那么建议。

exports.removeAttributes = function (arrayOfAttributesToRemove, object, callback) {
let checkForRemoveOrRetain = true;
removeORRetain(arrayOfAttributesToRemove, object, checkForRemoveOrRetain, (err, object) => {
if (err) {
callback(err);
} else {
callback( object);
}
});
};
exports.retainAttributes = function (arrayOfAttributesToRetain, object, callback) {
let checkForRemoveOrRetain = false;
removeORRetain(arrayOfAttributesToRemove, object, checkForRemoveOrRetain, (err, object) => {
if (err) {
callback(err);
} else {
callback(object);
}
});
}
let removeORRetain = function (arrayOfAttributesToRemove, object, checkForRemoveOrRetain, callback) {
if (Array.isArray(object)) {
for (let i = 0; i < object.length; i++) {
for (let key in object[i]) {
if (arrayOfAttributesToRemove.includes(key) === checkForRemoveOrRetain) {
delete object[i][key];
}
}
}
callback(object);
} else {
for (let key in object) {
if (arrayOfAttributesToRemove.includes(key) === checkForRemoveOrRetain) {
delete object[key];
}
}
callback( object);
}
}; 

Answer 1

使用lodash可以很容易地完成。

const _ = require('lodash');
exports.removeAttributes = function (arrayOfAttributesToRemove, object, callback) {
// check for errors etc. Then
// Create an array of objects if not already.
const arr = _.concat([], object);
// call callback with new arr with omitted properties using _.map and _.omit
callback(null, _.map(arr, e =>_.omit(e, arrayOfAttributesToRemove)));
};

如果您想保留属性，请使用_.pick