@solidarite/kafkajs/src/utils/arrayDiff.js

A modern Apache Kafka client for node.js

module.exports = (a, b) => {
  const result = []
  const length = a.length
  let i = 0

  while (i < length) {
    if (b.indexOf(a[i]) === -1) {
      result.push(a[i])
    }
    i += 1
  }

  return result
}