Objectかどうかの判定
jQuery.isPlainObjectみたいなやつ。こんな感じかな
function isObject(obj) { return obj instanceof Object && Object.getPrototypeOf(obj) === Object.prototype; } console.log(isObject({})); // true console.log(isObject({ foo: 'bar' })); // true console.log(isObject(new Object)); // true console.log(isObject(Object.create(Object.prototype))); // true console.log(isObject(Object)); // false console.log(isObject([])); // false console.log(isObject(new Array)); // false console.log(isObject(Array)); // false console.log(isObject('hoge')); // false console.log(isObject(new String)); // false console.log(isObject(null)); // false console.log(isObject(undefined)); // false var Foo = function() {}; var foo = new Foo(); console.log(isObject(Foo)); // false console.log(isObject(foo)); // false