Do 2 objects have the same keys - 2 ways

have-same-keys1.js

const haveSameKeys = (objA, objB) => {
    const keysOfA = Object.keys(objA)
    const keysOfB = Object.keys(objB)

    return keysOfA.length === keysOfB.length &&
        keysOfA.every(key => keysOfB.includes(key))
}

have-same-keys2.js

// limited to however many primes we have
const primes = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199]

const product = (a, b) => a * b

const haveSameKeys = (objA, objB) => {
    const keysOfA = Object.keys(objA)
    const keysOfB = Object.keys(objB)
    const allKeys = keysOfA.concat(keysOfB)
    
    const primeLookup = allKeys.reduce((acc, key, index) => {
        if (!(key in acc)) {
            acc[key] = primes[index]
        }
        return acc;
    }, {})

    const productOfA = keysOfA.map(key => primeLookup[key]).reduce(product)
    const productOfB = keysOfB.map(key => primeLookup[key]).reduce(product)

    return productOfA === productOfB
}