Last Item in Loop Processing

[Nathan Ward]

How can I detect the last item in a list is a for tag?

I am using Pebble to generate JSON. I have a list of objects that I need to iterate over and I need to include a comma after each one except for the last one. 

Here's the relevant template code where I tired to use the loop.index and loop.length in an IF statement., but it doesn't work (I'd need to check for loop.length -1 anyway). 

Template:

"menu": {
    "items": {
    {% for menuItem in menuItems %}
    "{{ menuItem.name }}": "{{ menuItem.value }}"{%- if loop.index < loop.length %},{% endif %}
    {%- endfor %}
    }

}

Example _desired_ Output:

"menu": {
    "items": {
         "item1": "Item 1",
         "item2": "Item 2
    }
}

I've used the Jinja2 Python template engine before, which has a syntax similar to Pebble. Jinja2 also has an index.last property that is a boolean and can be used in an IF statement like this. I don't know of anything similar in Pebble. 

Nathan

[Bastien Jansen]

The loop variable has first and last fields which can be used to do what you want, see https://github.com/PebbleTemplates/pebble/wiki/for.