playframework - Iterate over scala list -

i have list of strings in scala template of play framework.
want iterate on half of list @ 1 time , other half of list on second time.
not sure how write efficient iterator this.

i have tried
@for(i <- 0 until list.length/2 ) {list(i) }
, second loop

@for(i <- list.length/2+1 until list.length )   { list(i) }  

works complexity becomes high.

then later did

  @defining(list.size) { size =>      @for(i <- 0 until size/2)      {list(i) }   } 

seems work fine.

here's 1 way.

scala> list("a","b","c","d","e") res0: list[string] = list(a, b, c, d, e)  scala> res0.splitat(res0.size/2) res1: (list[string], list[string]) = (list(a, b),list(c, d, e))  scala> res1._1.foreach(println(_)) b  scala> res1._2.foreach(println(_)) c d e