---
title: "General Object Functions"
author: "Hauke Sonnenberg"
date: "`r Sys.Date()`"
output: rmarkdown::html_vignette
vignette: >
  %\VignetteIndexEntry{General Object Functions}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---

```{r setup, include = FALSE}
knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)
```

### Function `addClass()`

The function `addClass` adds an element to the `class` attribute of an object. 
You may never have heard about the `class` attribute. That's ok. It allows you
to assign a user-defined class to an object. By doing so, you can do some
nice stuff, for example:

```{r}
# Define your own print function for objects of class "birthday"
print.birthday <- function(x) {
  print(sprintf("It's your birthday: %s!", x))
}

# Define a birthday string and print it
x <- "January 14"
print(x)

# Now, set the class attribute to "birthday" and print again!
x <- kwb.utils::addClass(x, "birthday")
print(x)
```

General Object Functions

### Function getAttribute()
### Function getNamesOfObjectsInRDataFiles()
### Function getObjectFromRDataFile()
### Function hsRestoreAttributes()
### Function listObjects()
### Function loadObject()
### Function removeAttributes()