forked from projectmoon/tenebrous-dicebot
63 lines
1.6 KiB
JavaScript
63 lines
1.6 KiB
JavaScript
|
var baseGetTag = require('./_baseGetTag'),
|
||
|
|
getPrototype = require('./_getPrototype'),
|
||
|
|
isObjectLike = require('./isObjectLike');
|
||
|
|
|
||
|
|
/** `Object#toString` result references. */
|
||
|
|
var objectTag = '[object Object]';
|
||
|
|
|
||
|
|
/** Used for built-in method references. */
|
||
|
|
var funcProto = Function.prototype,
|
||
|
|
objectProto = Object.prototype;
|
||
|
|
|
||
|
|
/** Used to resolve the decompiled source of functions. */
|
||
|
|
var funcToString = funcProto.toString;
|
||
|
|
|
||
|
|
/** Used to check objects for own properties. */
|
||
|
|
var hasOwnProperty = objectProto.hasOwnProperty;
|
||
|
|
|
||
|
|
/** Used to infer the `Object` constructor. */
|
||
|
|
var objectCtorString = funcToString.call(Object);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is a plain object, that is, an object created by the
|
||
|
|
* `Object` constructor or one with a `[[Prototype]]` of `null`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @since 0.8.0
|
||
|
|
* @category Lang
|
||
|
|
* @param {*} value The value to check.
|
||
|
|
* @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* function Foo() {
|
||
|
|
* this.a = 1;
|
||
|
|
* }
|
||
|
|
*
|
||
|
|
* _.isPlainObject(new Foo);
|
||
|
|
* // => false
|
||
|
|
*
|
||
|
|
* _.isPlainObject([1, 2, 3]);
|
||
|
|
* // => false
|
||
|
|
*
|
||
|
|
* _.isPlainObject({ 'x': 0, 'y': 0 });
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.isPlainObject(Object.create(null));
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function isPlainObject(value) {
|
||
|
|
if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
var proto = getPrototype(value);
|
||
|
|
if (proto === null) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
|
||
|
|
return typeof Ctor == 'function' && Ctor instanceof Ctor &&
|
||
|
|
funcToString.call(Ctor) == objectCtorString;
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = isPlainObject;
|