Looping through array and output as pairs (divider for each second element)

Question

I have an array with anonymous elements. Elements are added to the array via php, like so:

$playlist = array();

while (databaseloop) {
  $playlist[] = $a_ti         


        

Answer 1

Destructive, but clean:

while (arr.length) {
  const Title  = arr.shift();
  const Length = arr.shift();

  // Do work.
}