Jekyll Posts Filename on Liquid.

Get filenames from my present blog posts on jekyll.

1.Split and pick the filename from the post of full path:

{% assign file = page.path | split: "/" | last %}

The page.path which respected the filepath that jekyll does generated.

2.Split the prefix of date, 8(number) + 3(hyphen) = 11(symbol):

{% assign pre = file | slice: 0,11 %}

{% assign pre = file | truncate: 11,"" %}

3.Drop that rests:

{% assign fn = file | remove: pre | remove: ".md" %}

For step1 to step3 may simplify:

{% assign fn = page.path | slice: $(a tuple)$ | remove: ".md" %}

Tuple that is a number pair:

(prefix-len + 11),(a number large than filename-len)

The _posts directory tree seems like this:

All posts from subfolder xxxx/ must referal the same filename to handle with, and easy:

{% assign fn = page.path | remove: "_posts/" | split: "/" | first %}

For now, type {{fn}} to uses that name:

![liquid markup]({{res}}/{{fn}}/my-picture.xxx)