Getting the index of the current loop in Play! 2 Scala template

by

Yes, zipWithIndex is built-in feature fortunately there’s more elegant way for using it:

@for((item, index) <- myItems.zipWithIndex) {
    <li>Item @index is @item</li>
}

The index is 0-based, so if you want to start from 1 instead of 0 just add 1 to currently displayed index:

<li>Item @{index+1} is @item</li>

PS: Answering to your other question – no, there’s no implicit indexes, _isFirst, _isLast properties, anyway you can write simple Scala conditions inside the loop, basing on the values of the zipped index (Int) and size of the list (Int as well). 

@for((item, index) <- myItems.zipWithIndex) {
    <div style="margin-bottom:20px;">
        Item @{index+1} is @item <br>
             @if(index == 0) { First element }
             @if(index == myItems.size-1) { Last element }
             @if(index % 2 == 0) { ODD } else { EVEN }
    </div>
}

More Related Contents:

  1. scala slick method I can not understand so far
  2. How to serve uploaded files in Play!2 using Scala?
  3. Scala start Play server in production
  4. What is Scala’s yield?
  5. Use of def, val, and var in scala
  6. What is the difference between JavaConverters and JavaConversions in Scala?
  7. Why does pattern matching in Scala not work with variables?
  8. What are type classes in Scala useful for?
  9. How to specify JVM maximum heap size “-Xmx” for running an application with “run” action in SBT?
  10. How to zip two (or more) DataFrame in Spark
  11. Linearization order in Scala
  12. How to convert A[B[C]] to B[A[C]] if A and B are monads?
  13. Using Either to process failures in Scala code
  14. Is there a way to control which implicit conversion will be the default used?
  15. Why can’t I return a concrete subtype of A if a generic subtype of A is declared as return parameter?
  16. how to filter out a null value from spark dataframe
  17. Implementing yield (yield return) using Scala continuations
  18. Is there a reason not to use SparkContext.getOrCreate when writing a spark job?
  19. What are the various join types in Spark?
  20. What is the rule for parenthesis in Scala method invocation?
  21. Static return type of Scala macros
  22. Spark Scala list folders in directory
  23. Scala: Parallel collection in object initializer causes a program to hang
  24. Equivalent to Ruby’s #tap method in Scala [duplicate]
  25. Difference between case object and object
  26. How to read a file as a byte array in Scala
  27. Is there a simple example of how to generate verilog from Chisel3 module?
  28. Run a scala code jar appear NoSuchMethodError:scala.Predef$.refArrayOps
  29. Spark UDF with varargs
  30. How to transpose an RDD in Spark

Leave a Comment