Bone Idle

Lazy Functional Library For Node.js

Option

None

var none = b_.option.none();
assertEquals(none.isEmpty(), true);
assertEquals(none.getOrNull(), null);
assertEquals(none.getOr(anotherValue), anotherValue);

Some

var some = b_.option.some(value);
assertEquals(b.isEmpty(), false);
assertEquals(some.get(), value);
assertEquals(some.getOrNull(), value);
assertEquals(none.getOr(anotherValue), value);

Either

Left

 var left = b_.either.left(value);
 assertEquals(left.isLeft(), true);
 assertEquals(left.isRight(), false);
 assertEquals(left.value()), value);

Right

 var right = b_.either.right(value);
 assertEquals(right.isLeft(), false);
 assertEquals(right.isRight(), true);
 assertEquals(right.value()), value)

Callback Chaining

isNotNull(str, function(ok) {
	if (ok) {
		hasLengthGreaterThan2(str, function(ok) {
			if (ok) {
				res.send("All good")
			} else {
				res.send("Bad Input");
			}
		})
	} else {
		res.send("Bad Input");
	}
});

Becomes

b_.chain(isNotNull).and(hasLengthGreaterThan2).call("some param", function(either) {
	if (either.isRight) {
		res.send("All Good");
	} else {
		res.send("Bad Input");
	}
})