PPT Slide

append(xs,ys,it)

case xs of [] => it = ys

| v :: vr => let var ur in

it = v :: ur;

append(vr,ws,ur)

end

thread

graph

(vs,ws,us) =>

case vs of [] => us = ws

| v :: vr => let var ur in

us = v :: ur;

append(vr,ws,ur)

end

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