SMART datagrid v.1 > Classes > DataSet
Return DataField object which has the same name as parameter fieldName.
If ignoreCase is true, it will not be case sensitive. If no corresponding field, it will return null.
var fieldIndex = dataset.getFieldIndex('quantity');
// It is quicker to approach by field index.
for (var i = 0; i < dataset.rowCount(); i++) {
dataset.setValue(i, fieldIndex, dataset.getValue(i, fieldIndex) + 10);
}