// Inputs
// inputs: An array of inputs.
// limit: The maximum number of operations at any one time.
// iterateeFn: The async function that should be called with each input to generate the corresponding output. It will have two arguments:
//      input: The input being processed.
//      callback: A function that will be called when the input is finished processing. It will be provided one argument, the processed output.
// callback: A function that should be called with the array of outputs once all the inputs have been processed.

function getNameById(id, callback) {
  // simulating async request
  const randomRequestTime = Math.floor(Math.random() * 100) + 200;
 
  setTimeout(() => {
    callback("User" + id)
  }, randomRequestTime);
}

function mapLimit(inputs, limit, iterateeFn, callback) {
  // implement here
}

mapLimit([1,2,3,4,5], 2, getNameById, (allResults) => {
  console.log('output:', allResults) // ["User1", "User2", "User3", "User4", "User5"]
})```