From 818a0bd6f1b3305351d482eeab4e9e64c2af3a18 Mon Sep 17 00:00:00 2001
From: Nguyễn Gia Phong <mcsinyx@disroot.org>
Date: Mon, 8 Mar 2021 21:45:21 +0700
Subject: Migrate *the rest* of the math blogs

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 menu3.md | 99 ----------------------------------------------------------------
 1 file changed, 99 deletions(-)
 delete mode 100644 menu3.md

(limited to 'menu3.md')

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-@def title = "Menu 3"
-
-# Working with tags
-
-**Example**:
-
-* page with tag [`syntax`](/tag/syntax/)
-* page with tag [`image`](/tag/image/)
-* page with tag [`code`](/tag/code/)
-
-\toc
-
-## Indicating tags
-
-To mark a page with tags, add:
-
-```markdown
-@def tags = ["tag1", "tag2"]
-```
-
-then that page, along with all others that have the tag `tag1` will be listed at `/tag/tag1/`.
-
-## Customising tag pages
-
-You can change how a `/tag/...` page looks like by modifying the `_layout/tag.html`. An important note is that you can **only** use **global** page variables (defined in `config.md`).
-
-There are three "exceptions":
-
-1. you can still use `{{ispage /tag/tagname/}} ... {{end}}` (or `{{isnotpage ...}}`) to have a different layout depending on the tag,
-1. you can use the `fd_tag` variable which contains the  name of the tag so `{{fill fd_tag}}` will input the tag string as is,
-1. you can use `{{fill varname path/to/page}}` to exploit a page variable defined in a specific page.
-
-## Customising tag lists
-
-By default the tag list is very simple: it just collects all pages that match the tags and it shows them in a simple list by anti-chronological order (more recent at the top).
-
-You can customise this by defining your own `hfun_custom_taglist` function in the `utils.jl` file. The commented blueprint for the simple default setting is below and should give you an idea of how to  write your own generator.
-
-Assuming you've defined such a function, don't forget to use `{{custom_taglist}}` in the `_layout/tag.html` instead of the default `{{taglist}}`.
-
-```julia
-function hfun_custom_taglist()::String
-    # -----------------------------------------
-    # Part1: Retrieve all pages associated with
-    #  the tag & sort them
-    # -----------------------------------------
-    # retrieve the tag string
-    tag = locvar(:fd_tag)
-    # recover the relative paths to all pages that have that
-    # tag, these are paths like /blog/page1
-    rpaths = globvar("fd_tag_pages")[tag]
-    # you might want to sort these pages by chronological order
-    # you could also only show the most recent 5 etc...
-    sorter(p) = begin
-        # retrieve the "date" field of the page if defined, otherwise
-        # use the date of creation of the file
-        pvd = pagevar(p, :date)
-        if isnothing(pvd)
-            return Date(Dates.unix2datetime(stat(p * ".md").ctime))
-        end
-        return pvd
-    end
-    sort!(rpaths, by=sorter, rev=true)
-
-    # --------------------------------
-    # Part2: Write the HTML to plug in
-    # --------------------------------
-    # instantiate a buffer in which we will write the HTML
-    # to plug in the tag page
-    c = IOBuffer()
-    write(c, "...1...")
-    # go over all paths
-    for rpath in rpaths
-        # recover the url corresponding to the rpath
-        url = get_url(rpath)
-        # recover the title of the page if there is one defined,
-        # if there isn't, fallback on the path to the page
-        title = pagevar(rpath, "title")
-        if isnothing(title)
-            title = "/$rpath/"
-        end
-        # write some appropriate HTML
-        write(c, "...2...")
-    end
-    # finish the HTML
-    write(c, "...3...")
-    # return the HTML string
-    return String(take!(c))
-end
-```
-
-For instance the default uses:
-
-```html
-<!-- 1, 3: simple list-->
-<ul>...</ul>
-<!-- 2: simple list item plugging in path + title -->
-<li><a href="/$rpath/">$title</a></li>
-```
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