Create code snippets by a loop in rmardown - r

Question

Similar to how to create a loop that includes both a code chunk and text with knitr in R i try to get text and a Code snippet created by a Loop.
Something along this:
---
title: Sample
output: html_document
params:
test_data: list("x <- 2", "x <- 4")
---
for(nr in 1:3){
cat(paste0("## Heading ", nr))
```{r, results='asis', eval = FALSE, echo = TRUE}
params$test_data[[nr]]
```
}
Expected Output would be:
What i tried:
I tried to follow: https://stackoverflow.com/a/36381976/8538074. But printing "```" did not work for me.

Answer 1

You can make use of knitr hooks. Take the following MRE:
---
title: "Untitled"
output: html_document
params:
test_data: c("x <- 2", "x <- 4")
---
```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```
```{r, results = 'asis', echo = F}
hook <- knitr::hooks_html()$source
opts <- knitr::opts_chunk$get()
chunks <- eval(parse(text = params$test_data))
for(nr in seq_along(chunks)){
cat(paste0("## Heading ", nr, "\n"))
cat(hook(chunks[nr], options = opts))
}
```
We get the default source hook and also the default chunk options. Then we get the test data, which is supplied as a string. Therefore we parse and evaluate that string.
In the loop we simply call the source hook on each element of the test data. Here is the result: