| $.xfun_strict_list | Strict lists | 
| as_strict_list | Strict lists | 
| attr | Obtain an attribute of an object without partial matching | 
| base64_decode | Encode/decode data into/from base64 encoding. | 
| base64_encode | Encode/decode data into/from base64 encoding. | 
| base64_uri | Generate the Data URI for a file | 
| cache_rds | Cache the value of an R expression to an RDS file | 
| compare_Rcheck | Run 'R CMD check' on the reverse dependencies of a package | 
| download_file | Try various methods to download a file | 
| embed_dir | Embed a file, multiple files, or directory on an HTML page | 
| embed_file | Embed a file, multiple files, or directory on an HTML page | 
| embed_files | Embed a file, multiple files, or directory on an HTML page | 
| file_ext | Manipulate filename extensions | 
| file_string | Read a text file and concatenate the lines by "\n" | 
| gsub_dir | Search and replace strings in files | 
| gsub_ext | Search and replace strings in files | 
| gsub_file | Search and replace strings in files | 
| gsub_files | Search and replace strings in files | 
| install_dir | Install a source package from a directory | 
| install_github | An alias of 'remotes::install_github()' | 
| in_dir | Evaluate an expression under a specified working directory | 
| isFALSE | Test if an object is identical to 'FALSE' | 
| is_ascii | Check if a character vector consists of entirely ASCII characters | 
| is_linux | Test for types of operating systems | 
| is_macos | Test for types of operating systems | 
| is_unix | Test for types of operating systems | 
| is_windows | Test for types of operating systems | 
| json_vector | A simple JSON serializer | 
| loadable | Attach or load packages, and automatically install missing packages if requested | 
| n2w | Convert numbers to English words | 
| native_encode | Try to use the system native encoding to represent a character vector | 
| normalize_path | Normalize paths | 
| numbers_to_words | Convert numbers to English words | 
| optipng | Run OptiPNG on all PNG files under a directory | 
| parse_only | Parse R code and do not keep the source | 
| pkg_attach | Attach or load packages, and automatically install missing packages if requested | 
| pkg_attach2 | Attach or load packages, and automatically install missing packages if requested | 
| pkg_load | Attach or load packages, and automatically install missing packages if requested | 
| pkg_load2 | Attach or load packages, and automatically install missing packages if requested | 
| print.xfun_raw_string | Print a character vector in its raw form | 
| print.xfun_strict_list | Strict lists | 
| prose_index | Find the indices of lines in Markdown that are prose (not code blocks) | 
| protect_math | Protect math expressions in pairs of backticks in Markdown | 
| raw_string | Print a character vector in its raw form | 
| Rcmd | Run the commands 'Rscript' and 'R CMD' | 
| read_utf8 | Read / write files encoded in UTF-8 | 
| rename_seq | Rename files with a sequential numeric prefix | 
| rev_check | Run 'R CMD check' on the reverse dependencies of a package | 
| Rscript | Run the commands 'Rscript' and 'R CMD' | 
| Rscript_call | Call a function in a new R session via 'Rscript()' | 
| rstudio_type | Type a character vector into the RStudio source editor | 
| same_path | Test if two paths are the same after they are normalized | 
| sans_ext | Manipulate filename extensions | 
| session_info | An alternative to sessionInfo() to print session information | 
| split_lines | Split a character vector by line breaks | 
| strict_list | Strict lists | 
| stringsAsStrings | Set the global option 'options(stringsAsFactors = FALSE)' inside a parent function and restore the option after the parent function exits | 
| strings_please | Set the global option 'options(stringsAsFactors = FALSE)' inside a parent function and restore the option after the parent function exits | 
| tojson | A simple JSON serializer | 
| tree | Turn the output of 'str()' into a tree diagram | 
| try_silent | Try to evaluate an expression silently | 
| upload_ftp | Upload to an FTP server via 'curl' | 
| upload_win_builder | Upload to an FTP server via 'curl' | 
| with_ext | Manipulate filename extensions | 
| write_utf8 | Read / write files encoded in UTF-8 |