indexOf error in FormAPI

I have a replicant drop-down (events) with mulitple options and I want to check each drop-down to see if a value exists. If it does exist then I want to pass the id of the replicant to an array. However when I run the following function, it breaks on the last line when I try to set the value. The error message that I get is:

TypeError: xpath.indexOf is not a function

	var index = xpath.indexOf("..");

function checkCollectOptions () {

var myRootNodes = IWDatacapture.getItem("/events").getChildren();
var featured_event = IWDatacapture.getItem("/featuredEvent");

var strResults1 = new Array();

for (var i=0; i<myRootNodes.length; i++) {

var id_val = myRootNodes[i].getChildByName("id").getValue();

var collect_val = myRootNodes[i].getChildByName("collections").getValue();

if (collect_val.indexOf(0) != -1) {
  strResults1.push(id_val);
        }

}

IWDatacapture.getItem(featured_event).setValue(strResults1);

}

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Comments

Adam Stoller

variable.indexOf() expects a string as an argument - not an integer. In your post you start off by saying you were using indexOf("..") - but in the code you posted below that it showed indexOf(0).

Aneel

Hi JoeS,

As per your requirement stated,

changing the condition from

if (collect_val.indexOf(0) != -1) to as below

if (collect_val.length > 0) would help.

As IWItem.getValue() returns Array of numbers of selected indices (zero-based) for multiple <select> and
<checkbox> items.

Regards, Aneel

JoeS

I found a solution. Turns out that indexOf() is not present in all browsers. You can work around this by utilizing the following shim at the beginning of your script.

if (!Array.prototype.indexOf) {
Array.prototype.indexOf = function(searchElement, fromIndex) {

var k;

    if (this == null) {
      throw new TypeError('"this" is null or not defined');
    }

var O = Object(this);
var len = O.length >>> 0;

    if (len === 0) {
      return -1;
    }

var n = +fromIndex || 0;

    if (Math.abs(n) === Infinity) {
      n = 0;
    }

    if (n >= len) {
      return -1;
    }

k = Math.max(n >= 0 ? n : len - Math.abs(n), 0);

    while (k < len) {
      if (k in O && O[k] === searchElement) {
        return k;
      }
      k++;
    }
    return -1;
};
}

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