Hi Mark, According to the language guide <https://nifi.apache.org/docs/nifi-docs/html/expression-language-guide.html#count> , the count can be done by: ${allMatchingAttributes("abc","xyz"):contains("world"):count()}
I'm wondering if I can contain this one in one of the processor, as a side product of "update attribute" or some other processor. Thanks, Tina -- Sent from: http://apache-nifi-developer-list.39713.n7.nabble.com/
