Function matchOn

See

test for matchOn

Example:

enum Thing {
   One = 'One',
   Two = 'Two',
   Three = 'Three'
}

const matchThings = matchOn(Object.values(Thing));

matchThings(Thing.Two, {
   [Thing.One]: () => 'I am one',
   [Thing.Two]: () => 'I am two',
   [Thing.Three]: () => 'I am three',
}).orElse('none of the above'); // produces: "I am two"

matchThings(undefined, {
   [Thing.One]: () => 'I am one',
   [Thing.Two]: () => 'I am two',
   [Thing.Three]: () => 'I am three',
}).orElse('none of the above'); // produces: "none of the above"
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