What is the best method to determine the length of an array in JavaScript while excluding any "Empty Slots"?

Are there any built-in functions, properties, or operators that can determine the length of an array without counting empty slots?

Answer №1

let numbersWithGaps = [0, , , 1, , , , , 2, , , , 3]
let filteredNumbers = numbersWithGaps.filter(function () { return true })
console.log(filteredNumbers.length)

Answer №2

console.log([null, "", undefined, '3',,'', 4].filter(element=>element!=="").length)

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