Question

My textfield has this value:

"1  
2  2
3  
4  4
5  a
6  
7  
8
"

When I split it by “\n” I get:

["1", "2  2", "3", "4  4", "5  a", "6", "7", "8", ""]

I want to delete the last element. I’m doing this:

$('#textArrayId').val().replace($('#textArrayId').val().split("\n")[$('#textArrayId').val().split("\n").length - 1], "")

And I can’t get it to delete. What to do?

I want to do this with string operations, not array operations.

Answer 1

To remove the last line, use this

var lines = $('#textArrayId').val().split("\n");
var withoutLastLine = lines.slice(0, -1).join("\n");
$('#textArrayId').val(withoutLastLine);

Or if you want to remove the last line without whitespace:

var lines = $.trim($('#textArrayId').val()).split("\n");
var withoutLastLine = lines.slice(0, -1).join("\n");
$('#textArrayId').val(withoutLastLine);

To remove the last element of an array, use this expression to receive all elements but the last:

x.slice(0, -1)