Why do the elements in my array show up as undefined?

Question

I can't seem to figure out why I can't get the information out of the array

const usedPlatformLog: Date[] = []
users.forEach(el => {
    usedPlatformLog.push(el.lastUsed)
})
console.log(usedPlatformLog) // shows array with indexes 0 and 1
console.log(usedPlatformLog[0]) // log response undefined

Answer 1

undefined is a valid value, and can be pushed into arrays.

your array is [undefined, undefined] probably because users[0].lastUsed and users[1].lastUsed are also undefined. Maybe console.log(users) so you can actually see what's in that array.