Empty string validation in Scala

Quick Note

Just a quick note before I forgot without even bumping my head on something. This is codes that I used on play framework template for print index and checking for empty string. You can add index to iteration by using zipWithIndex on a list, the index start from 0 as per usual

@for((imageUrl, index) <- imageUrls.zipWithIndex) {
  @if(imageUrl.exists(_.trim.nonEmpty)) {
    <br /><a href='@imageUrl' target="_blank">Image @(index + 1)</a>
  }
}