Question

I’m trying to rename some fields in a clone function, but I’m not sure how to rename (increase) the field name.

var tr = $copy.clone();
tr('input').each(function() {
  console.log(this.name); 
  this.name = something;
});

Example of field name:

field[subform][0][subsubform][2][name]

In this case I would need to increase [2] to [3]. The name could have more or less brackets, but it’s always the second last one that I would need to increase.

How do I go about doing this?

Answer 1

Regular expression fun. Matches a pattern [number][string]end Of line, reads the number, adds one, joins other part of match, and sets the new name.

$(tr).find("input").prop("name", function() {
    return this.name.replace(
        /\[(\d+)(\]\[[^[]+]$)/,
        function (a,b,c) { 
            return "[" + (parseInt(b,10)+1) + "]" +  c;
        }
    )
});