Run the commands 'Rscript' and 'R CMD'
Obtain an attribute of an object without partial matching
Try various methods to download a file
Embed a file, multiple files, or directory on an HTML page
Manipulate filename extensions
Read a text file and concatenate the lines by "\n"
Search and replace strings in files
Evaluate an expression under a specified working directory
Install a source package from a directory
An alias of 'remotes::install_github()'
Test if an object is identical to 'FALSE'
Check if a character vector consists of entirely ASCII characters
Try to use the system native encoding to represent a character vector
Normalize paths
Convert numbers to English words
Run OptiPNG on all PNG files under a directory
Test for types of operating systems
Parse R code and do not keep the source
Attach or load packages, and automatically install missing packages if requested
Find the indices of lines in Markdown that are prose (not code blocks)
Protect math expressions in pairs of backticks in Markdown
Print a character vector in its raw form
Read / write files encoded in UTF-8
Run 'R CMD check' on the reverse dependencies of a package
Type a character vector into the RStudio source editor
Test if two paths are the same after they are normalized
An alternative to sessionInfo() to print session information
Strict lists
Set the global option 'options(stringsAsFactors = FALSE)' inside a parent function and restore the option after the parent function exits
A simple JSON serializer
Try to evaluate an expression silently
Upload to an FTP server via 'curl'