- Yabs.io Search (in tags:Wff)urn:uuid:{A7ED2842-C0DD-9458-C89B-032798BCF050}2024-03-29T02:52:29ZCounting tokens allows us to test whether a postfix expression is wellformed. Anyone seen it before? (General Computing forum at Coderanch)5738982021-02-19T02:23:50ZZ236stevetaoPostfix notation validation? - Stack Overflow5738902021-02-18T15:34:26Z2021-02-18T18:23:59Z236stevetaoc++ - How do I properly test whether my postfix expression is valid? - Stack Overflow5738892021-02-18T15:32:26Z2021-02-18T18:24:11Z236stevetaologic - Number of brackets for a well-formed formula - Mathematics Stack Exchange5738882021-02-18T15:30:53Z2021-02-18T18:24:22Z236stevetao