The IF THEN ELSE of SDWAN - reality versus the lab
IF logical expression THEN procedure
I would have a procedure for when the data matched and a procedure for when it did not. Most programmers now avoid the latter. They programme the data to match and ignore mismatches. Basically error handling goes out the window. Often a decent programme would double in size when all the error handling routines were added. In those days we started with 16KB memory so space was at a premium but we still implemented it.
Read the article over at LinkedIn here.