One-to-many zip

one-to-many-zip.js

const parent = [
	{ name: 'cool dad', coolness: 3 },
	{ name: 'cool cat', coolness: 7 }
]

const children = [
	{ name: 'bobby', coolness: 1 },
	{ name: 'billy', coolness: 3 },
	{ name: 'bubba', coolness: 5 },
	{ name: 'benji', coolness: 6 }
]

const output = oneToManyZip({ parent, children }, function childMatchesParent({ parent, children }) {
	if (parent.coolness >= children.coolness) {
		return true
	}
})

const expectedOutput =  [
	{
		parent: { name: 'cool dad', coolness: 3 },
		children: [
			{ name: 'bobby', coolness: 1 },
			{ name: 'billy', coolness: 3 }
		]
	}, {
		parent: { name: 'cool cat', coolness: 7 },
		children: [
			{ name: 'bubba', coolness: 5 },
			{ name: 'benji', coolness: 6 }
		]
	}
]

t.deepEqual(output, expectedOutput)