How to separate a List into two Lists

In my form, I have multiple fields (hidden text boxes) which has the same name (eform_id). (For example I have 7 hidden textboxes which contains values like this 1234,-1235,1236,1237,-1238,-1239,1240).

I am getting those values to my js file like this.

var eformDetailIds=$("[name=eform_id]").map(function(){
    return $(this).val() }).get();

Now my requirement is I have to开发者_如何学Go separate this eformDetailIds into two lists..(or a string of comma separated values) so that first list contains all positive values and second list contains all negative values.

Please help me with suitable code which resolves my problem.

---

Well:

var positives = $.map(eformDetailIds, function(e) { return e >= 0 ? e : null; });
var negatives = $.map(eformDetailIds, function(e) { return e < 0 ? e : null; });

If you return null from the ".map()" callback, then nothing is added to the result array.

You could also do this with a simple(r) for loop:

var positives = [], negatives = [];
for (var i = 0; i < eformDetailIds.length; ++i)
  if (eformDetailIds[i] >= 0)
    positives.push(eformDetailIds[i]);
  else
    negatives.push(eformDetailIds[i]);
}

If you want a comma-separated string form, just call ".join()" on the array:

var strsPositive = positive.join(',');