Question

lets say inside a <textarea>, i type in a bunch of keywords on each new line.

keyword1
keyword2
keyword3
...




$('textarea[name=sometextarea]').val().split('\n').each(function(e){
alert($(this));                 
});

Answer 1

The array object doesn’t have any each method. As you are looping strings and not elements, use the jQuery.each method (instead of the jQuery().each method):

var lines = $('textarea[name=sometextarea]').val().split('\n');
$.each(lines, function(){
  alert(this);
});