hb-snippet-sort-by-date

_data.json

{
  "go-out-and-make-it-your-own": {
    "title": "Go Out & Make It Your Own",
    "date": "2013-08-19"
  },
  "an-out-of-order-article": {
    "title": "An out-of-order article",
    "date": "2014-11-01"
  },
  "welcome-to-harp": {
    "title": "Welcome to Harp",
    "date": "2013-09-01"
  },
  "aaa-welcome-to-harp": {
    "title": "AAA Welcome to Harp",
    "date": "1999-09-01"
  }
}

articles.jade

//- To keep the _data.json the same,
    make the slug a property of the
    object in a new array instead.

articles = []
for article, slug in public.articles._data
  if article.date
    - article.slug = slug
    - articles.push(public.articles._data[slug])

//- Now iterate over the articles,
    performing the desired operations.
    In this case, sorting by date from newest
    to olders, and stopping at the previously
    defined post postlimit.

ul
  for article in articles.sort(function(a,b){ a = new Date(a.date); b = new Date(b.date); return b<a?-1:b>a?1:0; }).slice(0, postlimit)
    li
      a(href="/articles/#{ article.slug }")
        time.post-meta-date.post-date(datetime="#{ new Date(article.date }")= article.date
        h2.post-item-title= article.title

//- If there are less posts than the postlimit,
    show a link to wherever all of them
    are show. In this case, the articles page.

if postlimit < articles.length
  a(href="/articles") View all articles