Mutation transfers a var X from state A to state B, so now, when we intend to use X we need to check is it A or B.
We actually do mutations for 'complex behaviour' - ability to launch different execution branches for the same input signals, which to launch is determined by current state of X. In such case X would be 'control state' (FSM term).
It is the appliance where it's truly needed, others are adding accidental complexity to simple data/value transformation.
Thanks for the post, got me thinking
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Mutation transfers a var X from state A to state B, so now, when we intend to use X we need to check is it A or B.
We actually do mutations for 'complex behaviour' - ability to launch different execution branches for the same input signals, which to launch is determined by current state of X. In such case X would be 'control state' (FSM term).
It is the appliance where it's truly needed, others are adding accidental complexity to simple data/value transformation.
Thanks for the post, got me thinking