Does it support zero-based in for-loop?

[diuming]

Does it support zero-base in for-loop? thanks.

for-loop like swift

{% for idx in 0..<rows %}
...
{% endfor %}

forloop.first in nested for-loop?

{% for row in 0...9 %}
    do something in row
    {% for column in 0...9 %}
        do something in column

        /* How do I check the forloop.first is for row or column */ 
        {% if forloop.first %} 
              do something if `row` is first
        {% endif %}

    {% endfor %}
{% endfor %}

access array in nested for-loop with operators(+, -, *, /, %)?

{% for row in 0...9 %}
    {% for column in 0...9 %}
         {{ set index = row (+, -, *, /, %) column }}
         {{ array[index].attribute.value }}
    {% endfor %}
{% endfor %}

[djbe]

1. For loops like swift: yes, we support the range syntax.
2. Nested for loops: this is now possible with Stencil 0.15, as long as you label your for loops
3. operators: do you mean arithmetics? Then no (for now)