$.each doesn't check for null

[mjlyco2@…]

var something = ['one', 'two', 'three'];

// some more code

// then woops!
something = null;

$.each(something, function(){
  console.log(this);
});

The code above will cause a js error on something.length. to fix it you need do do the following... maybe this check should be incorporated?

var something = ['one', 'two', 'three'];

// some more code

// then woops!
something = null;

if (something != nul) {
  $.each(something, function(){
    console.log(this);
  });
}

[rwaldron]

Thanks for reporting this, however jQuery cannot account for every possible arbitrary programming structure mistake. I recommend making a check for null before using $.each

[rwaldron]

Duplicate of #8547.

[dmethvin]

You can also say $.each(something || [], ...) and either indicates to other readers and your later self that you *knew* something could be null. This not only avoids the error, but provides valuable documentation about the program state.