Similarities between cosmo and mustache

cosmo-and-mustache.lua

require 'luarocks.require'
require 'cosmo'
require 'mustache'

do
    local template = "$do_cards[[$rank of $suit, ]]"
    local view = { 
        { rank = "Ace",   suit = "Spades",   show = true }, 
        { rank = "Queen", suit = "Diamonds", show = false }, 
        { rank = "10",    suit = "Hearts",   show = true }, 
    }

    local result   = cosmo.fill(template, {
        do_cards = function()
            for i,v in ipairs(view) do
                if v.show then cosmo.yield(v) end
            end
        end
    })
    print(result)    -- Ace of Spades, 10 of Hearts,
end

do 
    local template = "{{#cards}}{{#if_show}}{{rank}} of {{suit}}, {{/if_show}}{{/cards}}"
    local view = {
        if_show = function() return show end, 
        cards = { 
            { rank = "Ace",   suit = "Spades",   show = true }, 
            { rank = "Queen", suit = "Diamonds", show = false }, 
            { rank = "10",    suit = "Hearts",   show = true }, 
        }
    }

    local result = mustache.render(template, view)
    print(result)    -- Ace of Spades, 10 of Hearts,
end