How do I use the Temporary State "Set in" mothod?

[ScottR]

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Using setIn() to change a temp state variable

It's really useful to be able to create temp state variables and edit them using the setIn() method. However, we're finding the documentation about how to use it being somewhat limited. On the docs page for temporary state, it says: state.setIn(path, value: any) Sets the value of state.value at a specified location. The path variable accepts an array of keys/indexes to select. I.E. state.setIn( [ 0, "trout" ], {length_inches: 16 } ). The value will be set without destroying and recreating the…