Comparing array values in loop

Hi @nutradial, I think we may need a bit more information. But here goes:

(function () {

    var toolDiameters = [1, 3, 5];  //number value in pts

    var doc = app.activeDocument,
        items = doc.selection;

    for (var i = 0, item; i < items.length; i++) {

        item = items[i];

        if (hasWrongStrokeWidth(item)) {
            // example only!
            item.strokeWidth = 10;
        }

    }

/**
 * Returns true when `item` has a wrong stroke width.
 * @param {PageItem} item - the item to check.
 * @returns {Boolean}
 */
    function hasWrongStrokeWidth(item) {

        if (
            item.hasOwnProperty('strokeWidth')
            && item.strokeWidth === 0
        )
            return false;

        for (var t = 0; t < toolDiameters.length; t++)
            if (toolDiameters[t] === item.strokeWidth)
                return false;

        return true;

    };


})();

This script example sets the stroke width of any selected page item whose strokeWidth is not one of your "toolDiameters". 

- Mark