Function isBooleanObject

codebase/sources/dhtmlxscheduler.js:1452–1454

(obj)

    return obj && typeof obj === "object" && Function.prototype.toString.call(obj.constructor) === "function Number() { [native code] }";
  }
  function isBooleanObject(obj) {
    return obj && typeof obj === "object" && Function.prototype.toString.call(obj.constructor) === "function Boolean() { [native code] }";
  }
  function isDate$1(obj) {
    if (obj && typeof obj === "object") {
      return !!(obj.getFullYear && obj.getMonth && obj.getDate);