change-first
change-first works like Pd’s native change for two-element lists, outputting an incoming list only when its first element differs from the previous list’s first element. Changes to the second element alone do not cause output.
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Open
Pdand go toToolsFind Externals. Search forvabsand install it. Then create an object withdeclare -lib vabs -path vabs. Finally, usechange-firstor any other object fromvabs.