This week's book giveaway is in the Java in General forum. We're giving away four copies of Beginning Java 17 Fundamentals: Object-Oriented Programming in Java 17 and have ishori Sharan & Adam L Davis on-line! See this thread for details.
I am building a calculator service using Eclipse & BPEL designer with Apache ODE and this is where i got stuck:
If i use concat instead of sum, there is no compilation error. But i need to make the sum of the variables. I have checked the documentation for this function and the signature is: fn:sum(arg,arg,...). What could be wrong here?
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