> It is possible to patch a running CL system by simply setting a breakpoint and then revaluating a function. It's also possible to change a running CL system

> It is possible to patch a running CL system by simply setting a breakpoint and then revaluating a function. It's also possible to change a running CL system without setting a breakpoint and/or re-evaluating a function. > I am unaware of any other language that is possible in. Start with Smalltalk and then search for more.