accepting a custom isEqual function #16
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This is to address #15.
This seems by far the easiest way to implement the feature, but introduces a slight inconsistency. Apparently the
Modelconstructor is specified to treat anundefinedinitial value as any other value. Strictly enforcing this policy would make it impossible to specify a second argument without specifying an initial value. So this code enforces that policy only if no second argument is given.Let me know what you think.