Hello. You are stepping into the same trap as How to keep exercise and solution together in source, but render them separately? - #3 by Andrew and Why is my random shuffle always producing the same result when using Suiji? - #9 by Andrew.
#let ref-type = (definition: "Definition", theorem: "Theorem", lemma: "Lemma")
#let lecture-refs = (
def1-1: (
lecture: 1,
index: 1,
type: ref-type.definition,
content: [This is my first definition.],
),
the1-2: (
lecture: 1,
index: 2,
type: ref-type.theorem,
content: [This is the second entry but its a theorem.],
),
the2-1: (
lecture: 2,
index: 1,
type: ref-type.theorem,
content: [This theorem is relevant but I won't need it for the notes.],
),
def2-2: (
lecture: 2,
index: 2,
type: ref-type.definition,
content: [Let's define some more items.],
),
lem3-1: (
lecture: 3,
index: 1,
type: ref-type.lemma,
content: [Now we add a lemma for a change.],
),
)
#let lecture-ref(def) = context {
let state = state("used-literature-refs", ())
let array = state.get()
if not array.contains(def) {
state.update(array => array + (def,))
}
ref(label(def))
}
#let used-lecture-refs() = context {
let used = state("used-literature-refs").final()
if used.len() == 0 { return }
[= Lecture References]
set heading(numbering: "1.1")
for (key, value) in used.map(key => (key, lecture-refs.at(key))) {
counter(heading).update((value.lecture, value.index - 1))
[#heading(depth: 2, supplement: value.type)[#value.type]#label(key)]
value.content
}
}
#let template(doc) = {
doc
used-lecture-refs()
}
#show: template
= Homework
In my homework I need to reference some content from the lectures like
#lecture-ref("def1-1"), #lecture-ref("the1-2"), #lecture-ref("def2-2"),
#lecture-ref("lem3-1")
