Is it possible to check the array size or check if the first element exists?

[Vinícius Carneiro]

I would like to do something like:

{{#id_equipe.0}}
AND(
{{#id_equipe}}
id_equipe= {{.}} OR
{{/id_equipe}}
1=2)
{{/id_equipe.0}}

input:

{
  "id_equipe":[55, 52]
}

the result would be:

AND( id_equipe= 55 OR id_equipe= 52 OR 1=2

[Vinícius Carneiro]

I tried here http://mustache.github.io/#demo and it works, but I am using  this version:

<dependency>
    <groupId>com.github.spullara.mustache.java</groupId>
    <artifactId>compiler</artifactId>
    <version>0.9.5</version>
    <scope>compile</scope>
</dependency>

And did not work :/ the result is empty

[Sam Pullara]

The Java version of mustache doesn't have that behavior as it isn't in the specification. I recommend having a view class that sits between the template and your data[1]. However, if you want to use that syntax you can steal the code in this test:

https://github.com/spullara/mustache.java/blob/master/compiler/src/test/java/com/github/mustachejava/ArraysIndexesTest.java

It will automatically wrap your arrays with a map interface that lets you look up elements by numerical offset.

Sam

[1] https://javarants.com/mustache-is-logic-less-but-the-logic-has-to-go-somewhere-3e976b7a49c8

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[Hòa Lê]

You can wrapper your list with DecoratedCollection.

     public List<TripImage> getExpImage() {

        return expImage;

    }

    public void setExpImage(List<TripImage> expImage) {

        this.expImage = expImage;

    }

    public DecoratedCollection<TripImage> getExtImage() {

        if(this.expImage!=null) {

            return new DecoratedCollection<>(this.expImage);

        }

        return null;

    }

and in view:

 {{#trip}}{{#extImage}}

{{index}}

{{#value}}{{imageId}}{{/value}}

                                          

{{/extImage}}{{/trip}}

or {{first}} {{last}}

Vào 23:22:58 UTC+7 Thứ Năm, ngày 17 tháng 5 năm 2018, Vinícius Carneiro đã viết:

[Sam Pullara]

Thanks Hòa, forgot that was included.

Sam

[Devaraj Gurikar]

Sam,

how to do similar check in Play Scala project??

I tried list.size in java it works but not in Scala project.

Regards

Devaraj 

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[Sam Pullara]

I think in Scala there is a way to get a normal Java list out of a Scala one and then wrap that. But you could also just write your own decorator that does that work.

https://stackoverflow.com/questions/2429944/how-to-convert-a-scala-list-to-a-java-util-list

Sam

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