h1
## h21121
12121
```vega
{
"$schema": "https://vega.github.io/schema/vega-lite/v4.json",
"description": "Plots two functions using a generated sequence.",
"width": 300,
"height": 150,
"data": {
"sequence": {
"start": 0,
"stop": 12.7,
"step": 0.1,
"as": "x"
}
},
"transform": [
{
"calculate": "sin(datum.x)",
"as": "sin(x)"
},
{
"calculate": "cos(datum.x)",
"as": "cos(x)"
},
{
"fold": ["sin(x)", "cos(x)"]
}
],
"mark": "line",
"encoding": {
"x": {
"type": "quantitative",
"field": "x"
},
"y": {
"field": "value",
"type": "quantitative"
},
"color": {
"field": "key",
"type": "nominal",
"title": null
}
}
}
```
:::spoiler
hide me
:::
```graphviz
digraph {
compound=true
rankdir=RL
graph [ fontname="Source Sans Pro", fontsize=20 ];
node [ fontname="Source Sans Pro", fontsize=18];
edge [ fontname="Source Sans Pro", fontsize=12 ];
subgraph core {
c [label="Hackmd-it \ncore"] [shape=box]
}
c -> sync [ltail=session lhead=session]
subgraph cluster1 {
concentrate=true
a [label="Text source\nGithub, Gitlab, ..."] [shape=box]
b [label="HackMD Editor"] [shape=box]
sync [label="sync" shape=plaintext ]
b -> sync [dir="both"]
sync -> a [dir="both"]
label="An edit session"
}
}
```