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6th Week of 2022

Introduction⚑

  • New: Xprop.

    You can use xprop to get the name and details of any running graphic application by clicking on it.

Computer Science⚑

GNULinux⚑

FFmpeg⚑

  • New: Concatenate and convert files.

    ffmpeg -i "concat:1.ogg|2.ogg" out.mp3

  • New: Cropping.

    ffmpeg -ss 30 -t 70 -i inputfile.mp3 outputfile.mp3
    • -ss refers to the starting time.
    • -t is the duration after the starting time to consider.

Programming⚑

Jinja⚑

  • New: Accessing the parent Loop.

    The special loop variable always points to the innermost loop. If it’s desired to have access to an outer loop it’s possible to alias it:

    <table>
{% for row in table %}
  <tr>
  {% set rowloop = loop %}
  {% for cell in row %}
    <td id="cell-{{ rowloop.index }}-{{ loop.index }}">{{ cell }}</td>
  {% endfor %}
  </tr>
{% endfor %}
</table>

NGINX⚑

  • New: Support named routes.

    To support named routes (e.g., APP_HOST/some/route), add the following configuration to the host configuration file:

    location / {
    try_files $uri $uri/ /index.html;
}

    Otherwise NGINX will return 404 when queried for a named route since the corresponding file won't exist in the root directory.