Entry

How can I check whether an object is an Array?

Mar 8th, 2000 09:05
Martin Honnen,

You can check the constructor:
  function isArray (object) {
    if (!window.Array)  // js1.0 has no Arrays
      return false;
    else
      return object.constructor == window.Array;
  }

Examples
  var a = new Array();
  var b = 2;
  alert(isArray(a))
  alert(isArray(b))