问题
I've been learning github markdown, I had a question about variables and macros.
is it possible to define a variable or macro to prevent repeated printing of a block of text?
The use case is that I have a table producing a big grid of hyperlinks - the links look like the below.
http://www.a-big-long-big-big-long-hyperlink/more-long-stuff?id=1234
it would be nice if I could do something like the below once:
$link=http://www.a-big-long-big-big-long-hyperlink/more-long-stuff?id
and then in each cell in the table, I can say something like
$link=1234
Some other cell
$link=2345
the idea being that:
- The table (which has ~10 columns and ~10 rows) is a bit easier to see on a normal screen, at the moment with the prefix to the links being so long, it looks really ugly as the links wrap to the next line
- If I want to change the root link, I can change it in one place (yes, I know I could do search and replace in an editor!)
Cheers.
回答1:
Below are a few ways to write Reference-Links
[I'm an inline-style link](https://www.somewebsite.com)
[I'm an inline-style link with title](https://www.somewebsite.com "somewebsite's Homepage")
[I'm a reference-style link][Arbitrary case-insensitive reference text]
[I'm a relative reference to a repository file](../blob/master/LICENSE)
[You can use numbers for reference-style link definitions][1]
Or leave it empty and use the [link text itself]
Some text to show that the reference links can follow later.
[arbitrary case-insensitive reference text]: https://www.somewebsite.org
[1]: http://somewebsite.org
[link text itself]: http://www.somewebsite.com
回答2:
You can use a feature of Markdown called "Reference-style links".
[link text][id] or just [link text] if link-text is unique and consist only of letters, numbers, spaces and punctuation. They are not case sensitive.
then somewhere in the document you define what id is:
[id]: http://example.com/whatever
See https://github.com/biserkov/markdown-playground/blob/master/README.md and
https://raw.githubusercontent.com/biserkov/markdown-playground/master/README.md
回答3:
GitHub Markdown (for .md files) has variables through capture:
{% capture nameOfVariableToCapture %}any markdown here...{% endcapture %}
{{ nameOfVariableToCapture }} -- that prints the content of the variable
or from {% assign variableName = "text etc." %}.
As a test, I created https://github.com/SeLite/SeLite.github.io/blob/master/MarkdownTest.md. You can see its content at http://selite.github.io/MarkdownTest (ignore the header and footer, that comes from a framework).
来源：https://stackoverflow.com/questions/24580042/github-markdown-are-macros-and-variables-possible