yishayw edited a comment on issue #417: ArrayCollection implementation of PropertyNames() method URL: https://github.com/apache/royale-asjs/issues/417#issuecomment-602036780 I'm not sure if it's related, but the following code (dataProvider is a non-empty ArrayCollection): for each (var row:Object in dataProvider) { if (ExpressionUtils.resolveExpression(row, col.dataField, _processValues, _ignoreValues)) { count++; } } return count; row is undefined on the first iteration.
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