June 2007 Entries
I tell ya' this feature is almost enough to get me to change my bank. Citi has no physical locations at all that are close to me but this feature is so friggin' cool it may win me over once I get a fancy new phone. https://web.da-us.citibank.... US Bank when are you going to get this? -d...
The fundamental idea is that we should divide an object's methods into two sharply separated categories: Queries: Return a result and do not change the observable state of the system (are free of side effects). Commands: Change the state of a system but do not return a value. So I have been thinking a lot about Command Query Separation (CQS) lately as I not long ago ran into a Heisen Bug that thankfully didn't take a lot of time to spot or fix but mostly just made me aware of the problem. However,...