In looking for a lightweight NoSQL store for stashing semi-structured data intermediates and analysis results, I stumbled upon CouchDB. Toted as a ‘database for web developers’, I’m finding that it equally suited for serving the casual data science project. In addition to its main function as a key-value json document store, CouchDB also makes heavy use of JavaScript for MapReduce based querying and has a built in HTTP server along with RESTful API for serving documents. It can even serve static html/css/javascript content, including D3 visualizations with ready access to CouchDB’s data. This arsenal of features effectively offers data collection, transformation, querying and visualization all from within the same platform. Quite handy for rapidly developing prototypes and reports! Go check it out at http://couchdb.apache.org/, or rapidly deploy an instance using docker.

This is a test post.

What’s up world!

This is my first test blog post using jekyll.

Post initiated with…

rake new_post

Here be a sample post with a custom background image. To utilize this “feature” just add the following YAML to a post’s front matter.

image:
  background: filename.png

This little bit of YAML makes the assumption that your background image asset is in the /images folder. If you place it somewhere else or are hotlinking from the web, just include the full http(s):// URL. Either way you should have a background image that is tiled.

If you want to set a background image for the entire site just add background: filename.png to your _config.yml and BOOM — background images on every page!

Background images from Subtle Patterns (Subtle Patterns) / CC BY-SA 3.0

Syntax highlighting is a feature that displays source code, in different colors and fonts according to the category of terms. This feature facilitates writing in a structured language such as a programming language or a markup language as both structures and syntax errors are visually distinct. Highlighting does not affect the meaning of the text itself; it is intended only for human readers.

Pygments Code Blocks

To modify styling and highlight colors edit /assets/less/pygments.less and compile main.less with your favorite preprocessor. Or edit main.css if that’s your thing, the classes you want to modify all begin with .highlight.

#container {
    float: left;
    margin: 0 -240px 0 0;
    width: 100%;
}

Line numbering enabled:

1 <nav class="pagination" role="navigation">
2     {% if page.previous %}
3         <a href="{{ site.url }}{{ page.previous.url }}" class="btn" title="{{ page.previous.title }}">Previous article</a>
4     {% endif %}
5     {% if page.next %}
6         <a href="{{ site.url }}{{ page.next.url }}" class="btn" title="{{ page.next.title }}">Next article</a>
7     {% endif %}
8 </nav><!-- /.pagination -->
module Jekyll
  class TagIndex < Page
    def initialize(site, base, dir, tag)
      @site = site
      @base = base
      @dir = dir
      @name = 'index.html'
      self.process(@name)
      self.read_yaml(File.join(base, '_layouts'), 'tag_index.html')
      self.data['tag'] = tag
      tag_title_prefix = site.config['tag_title_prefix'] || 'Tagged: '
      tag_title_suffix = site.config['tag_title_suffix'] || '&#8211;'
      self.data['title'] = "#{tag_title_prefix}#{tag}"
      self.data['description'] = "An archive of posts tagged #{tag}."
    end
  end
end

Standard Code Block

<nav class="pagination" role="navigation">
    {% if page.previous %}
        <a href="{{ site.url }}{{ page.previous.url }}" class="btn" title="{{ page.previous.title }}">Previous article</a>
    {% endif %}
    {% if page.next %}
        <a href="{{ site.url }}{{ page.next.url }}" class="btn" title="{{ page.next.title }}">Next article</a>
    {% endif %}
</nav><!-- /.pagination -->

Fenced Code Blocks

To modify styling and highlight colors edit /assets/less/coderay.less and compile main.less with your favorite preprocessor. Or edit main.css if that’s your thing, the classes you want to modify all begin with .coderay. Line numbers and a few other things can be modified in _config.yml under coderay.

#container {
    float: left;
    margin: 0 -240px 0 0;
    width: 100%;
}
<nav class="pagination" role="navigation">
    {% if page.previous %}
        <a href="{{ site.url }}{{ page.previous.url }}" class="btn" title="{{ page.previous.title }}">Previous article</a>
    {% endif %}
    {% if page.next %}
        <a href="{{ site.url }}{{ page.next.url }}" class="btn" title="{{ page.next.title }}">Next article</a>
    {% endif %}
</nav><!-- /.pagination -->
module Jekyll
  class TagIndex < Page
    def initialize(site, base, dir, tag)
      @site = site
      @base = base
      @dir = dir
      @name = 'index.html'
      self.process(@name)
      self.read_yaml(File.join(base, '_layouts'), 'tag_index.html')
      self.data['tag'] = tag
      tag_title_prefix = site.config['tag_title_prefix'] || 'Tagged: '
      tag_title_suffix = site.config['tag_title_suffix'] || '&#8211;'
      self.data['title'] = "#{tag_title_prefix}#{tag}"
      self.data['description'] = "An archive of posts tagged #{tag}."
    end
  end
end