Topic: The previous value of a node in a cycle
Cycle for each, inside it is necessary to deduce certain values, only if they differ from the previous.
Tried to get a variable and in a cycle to write to it the previous value, but she should be declared before.
But if to declare it before a cycle works not correctly.
Probably, there is a variant without a variable to address to value of the previous position in a cycle for each?