About 10 years ago, A+ was just used as the communications protocol for fixed income. Nothing (that I knew of) used it, but C++ ceremoniously created A+ objects, sent them over the wire to another C++ process that decoded them.
Around that time, we moved much of the mortgage models over to kdb and q, which was fun. Lots of weird dark little corners in that language. (List of dicts? Nope! It's a table now! 'sum x' drop NAs, while 0+/x was NA if any value was NA, but maybe only for ints, not floats, etc. Ugh.)
Around that time, we moved much of the mortgage models over to kdb and q, which was fun. Lots of weird dark little corners in that language. (List of dicts? Nope! It's a table now! 'sum x' drop NAs, while 0+/x was NA if any value was NA, but maybe only for ints, not floats, etc. Ugh.)