'use strict';
|
|
/**
|
* High performance assign before node6
|
* @param {Object} target - target object
|
* @param {Object | Array} objects - object assign from
|
* @return {Object} - return target object
|
*/
|
exports.assign = function(target, objects) {
|
if (!Array.isArray(objects)) {
|
objects = [ objects ];
|
}
|
|
for (var i = 0; i < objects.length; i++) {
|
var obj = objects[i];
|
if (obj) {
|
var keys = Object.keys(obj);
|
for (var j = 0; j < keys.length; j++) {
|
var key = keys[j];
|
target[key] = obj[key];
|
}
|
}
|
}
|
return target;
|
};
|
|
exports.has = function has(obj, prop) {
|
return Object.prototype.hasOwnProperty.call(obj, prop);
|
};
|
|
/**
|
* Get all enumerable and ownership of property names
|
* @param {Object} obj - detect object
|
* @param {Boolean} [ignoreNull] - ignore null, undefined or NaN property
|
* @return {Array<String>} property names
|
*/
|
exports.getOwnEnumerables = function getOwnEnumerables(obj, ignoreNull) {
|
if (!obj || typeof obj !== 'object' || Array.isArray(obj)) {
|
return [];
|
}
|
return Object.keys(obj).filter(function(key) {
|
if (ignoreNull) {
|
var value = obj[key];
|
if (value === null || value === undefined || Number.isNaN(value)) {
|
return false;
|
}
|
}
|
return exports.has(obj, key);
|
});
|
};
|
|
/**
|
* generate a real map object(clean object), no constructor, no __proto__
|
* @param {Object} [obj] - init object, optional
|
* @return {Object}
|
*/
|
exports.map = function map(obj) {
|
var map = new EmptyObject();
|
if (!obj) {
|
return map;
|
}
|
|
for (var key in obj) {
|
map[key] = obj[key];
|
}
|
return map;
|
};
|
|
// faster way like `Object.create(null)` to get a 'clean' empty object
|
// https://github.com/nodejs/node/blob/master/lib/events.js#L5
|
// https://cnodejs.org/topic/571e0c445a26c4a841ecbcf1
|
function EmptyObject() {}
|
EmptyObject.prototype = Object.create(null);
|
