Loop over checked records in a CDF

jsx3.gui.Matrix.prototype.each = function(strXPathPredicate, fctYield) {
	var iteRecord = cdfDocument.selectNodeIterator('//record[' + strXPathPredicate + ']')
	var iIndex = 0;
	while (iteRecord.hasNext()) {
		var rnCurrent = iteRecord.next();
		fctYield(this, rnCurrent, iIndex++)
	}
}

/**
 * Creates a new array using the mapped values of each record in this matrix
 * that matches the XPath predicate <code>strXPathPredicate</code>.
 * <code>fctMap</code> is called for each record in this matrix and the
 * matrix object, record node and the index are passed as the argument.
 * The new array is constructed with the return values of each call to <code>fctMap</code>.
 * @param fctMap {Function}
 * @return {jsx3.$Array}
 */
jsx3.gui.Matrix.prototype.map = function(strXPathPredicate, fctMap) {
	var iteRecord = this.getXML().selectNodeIterator('//record[' + strXPathPredicate + ']')
	var iIndex = 0;
	var arrResult = jsx3.$A();
	while (iteRecord.hasNext()) {
		var rnCurrent = iteRecord.next();
		arrResult.push(fctMap(this, rnCurrent, iIndex++))
	}
	return arrResult
}

jsx3.gui.Matrix.prototype.map2 = function(strXPathPredicate, fctMap) {
	return jsx3.$A(this.selectNodes(strXPathPredicate)).map(fctMap)
}

jsx3.gui.Matrix.prototype.eachChecked = function(fctYield) {
	this.each('@checked=1', fctYield)
}

jsx3.gui.Matrix.prototype.getCheckedRecordIds = function() {
	return this.map('@checked=1', function(mtxMyMatrix, rnMyRecordNode, iIndex) {
		return rnMyRecordNode.getAttribute('jsxid')
	})
}

myAPP.APP.getJSXByName("mtxEod").eachChecked(function(mtxMyMatrix, rnMyRecordNode, iIndex) {
	jsx3.log('record node jsxtext=' + rnMyRecordNode.getAttribute('jsxtext') + ' is checked')
})
myApp.APP.getJSXByName("mtxEod").getCheckedRecordIds()