How to check if an object is an array?

Question

I\'m trying to write a function that either accepts a list of strings, or a single string. If it\'s a string, then I want to convert it to an array with just the one item so

Answer 1

In your case you may use concat method of Array which can accept single objects as well as array (and even combined):

function myFunc(stringOrArray)
{
  var arr = [].concat(stringOrArray);

  console.log(arr);

  arr.forEach(function(item, i)
  {
    console.log(i, "=", item);
  })
}

myFunc("one string");

myFunc(["one string", "second", "third"]);

concat seems to be one of the oldest methods of Array (even IE 5.5 knows it well).