Receiving "not found: value" even the variable is define

Question

I'm receiving not found: value counter even though the variable is defined. Any help with this? I'm new with scala and everything is new to my eyes. Thanks

@{def counter = 0}
@for(atg <- Activity.groupContiguous(activityGroup)) {
  @if(!atg.isEmpty) {
    @views.html.activity.activityTypeGroup(atg, counter))
  }
  counter = counter + 1
}

score 3 · Answer 1 · answered Feb 07 '14 at 12:19

3

You code doesn't work because @{def counter = 0} doesn't define anything in the template scope and returns Unit. I don't know any convenient way to define mutable variable in the scala template, and this is actually discouraged.

The code could be easily rewritten using functional approach:

@for((atg, counter) <- Activity.groupContiguous(activityGroup).filterNot(_.isEmpty).zipWithIndex) {
  @views.html.activity.activityTypeGroup(atg, counter))
}

answered Feb 07 '14 at 12:19

vitalii

3,335
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18

Thanks vitali, additional question. How can I increment counter value? I tried counter = counter + 1 but upon checking in the view the result became 0 = counter + 1; – Monnster Feb 07 '14 at 12:42

score 0 · Answer 2 · edited May 23 '17 at 12:13

0

Take a look to other similar issue, you can solve it with zipWithIndex https://stackoverflow.com/a/14613877/1066240

Yo'll find there also other useful examples.

edited May 23 '17 at 12:13

Community

1
1

answered Feb 07 '14 at 16:05

biesior

55,576
10
125
182

Receiving "not found: value" even the variable is define

2 Answers2