evaporei · September 13, 2019 19:48
diff --git a/category-theory-monoid-integer-sum.ts b/category-theory-monoid-integer-sum.ts
 Number.prototype.mappend = function (x: Number): Number {
    return this + x
 }

 Number.prototype.mempty = function (): Number {
    return 0
 }

 console.log('mappend:', Number(5).mappend(4)) // 9
 console.log('mempty:', Number().mempty()) // 0
	Number.prototype.mappend = function (x: Number): Number {
	return this + x
	}

	Number.prototype.mempty = function (): Number {
	return 0
	}

	console.log('mappend:', Number(5).mappend(4)) // 9
	console.log('mempty:', Number().mempty()) // 0
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