| Generate ID strings | alnum_id |
| Obtain an attribute of an object without partial matching | attr |
| Get base R package names | base_pkgs |
| Encode/decode data into/from base64 encoding. | base64_decode base64_encode |
| Generate the Data URI for a file | base64_uri |
| Start a background process | bg_process |
| Find out broken packages and reinstall them | broken_packages |
| Bump version numbers | bump_version |
| Cache the execution of an expression in memory or on disk | cache_exec |
| Cache the value of an R expression to an RDS file | cache_rds |
| Submit check jobs to crandalf | crandalf_check crandalf_results |
| Parse comma-separated chunk options | csv_options |
| Evaluate an expression after forcing the decimal point to be a dot | decimal_dot |
| Delete an empty directory | del_empty_dir |
| Create a directory recursively by default | dir_create |
| Test the existence of files and directories | dir_exists file_exists |
| Divide chunk options from the code chunk body | divide_chunk |
| Perform a task once in an R session | do_once |
| Download a file from a URL and cache it on disk | download_cache |
| Try various methods to download a file | download_file |
| Embed a file, multiple files, or directory on an HTML page | embed_dir embed_file embed_files |
| Retrieve a global option from both 'options()' and environment variables | env_option |
| Find file paths that exist | existing_files |
| Call 'on.exit()' in a parent function | exit_call |
| Create a fenced block in Markdown | fenced_block fenced_div make_fence |
| Manipulate filename extensions | file_ext sans_ext with_ext |
| Read a text file and concatenate the lines by ''\n'' | file_string |
| Format numbers of bytes using a specified unit | format_bytes |
| Get the relative path of a path in a project relative to the current working directory | from_root |
| Get the tags of GitHub releases of a repository | github_releases |
| Perform replacement with 'gsub()' on elements matched from 'grep()' | grep_sub |
| Search and replace strings in files | gsub_dir gsub_ext gsub_file gsub_files |
| Evaluate an expression under a specified working directory | in_dir |
| Install a source package from a directory | install_dir |
| An alias of 'remotes::install_github()' | install_github |
| Test if paths are relative or absolute | is_abs_path is_rel_path |
| Check if a character vector consists of entirely ASCII characters | is_ascii |
| Test if a character vector consists of blank strings | is_blank |
| Test if a path is a subpath of a dir | is_sub_path |
| Test if a path is a web path | is_web_path |
| Test for types of operating systems | is_arm64 is_linux is_macos is_unix is_windows |
| Save objects to files and lazy-load them | lazy_load lazy_save |
| Find a file or directory under a root directory | magic_path |
| Mark some paths as directories | mark_dirs |
| Generate a simple Markdown pipe table | md_table |
| Calculate the MD5 checksums of R objects | md5 |
| Generate a message with 'cat()' | msg_cat |
| Try to use the system native encoding to represent a character vector | native_encode |
| Create a local web application | new_app |
| Convert package news to the Markdown format | news2md |
| Normalize paths | normalize_path |
| Convert numbers to English words | n2w numbers_to_words |
| Run OptiPNG on all PNG files under a directory | optipng |
| Parse R code and do not keep the source | parse_only |
| Attach or load packages, and automatically install missing packages if requested | loadable pkg_attach pkg_attach2 pkg_available pkg_load pkg_load2 |
| Kill a process and (optionally) all its child processes | proc_kill |
| Read a text file, process the text with a function, and write the text back | process_file sort_file |
| Return the (possible) root directory of a project | proj_root root_rules |
| Find the indices of lines in Markdown that are prose (not code blocks) | prose_index |
| Protect math expressions in pairs of backticks in Markdown | protect_math |
| Print a character vector in its raw form | print.xfun_raw_string raw_string |
| Read all text files and concatenate their content | read_all |
| Read all records of a binary file as a raw vector by default | read_bin |
| Read / write files encoded in UTF-8 | append_unique append_utf8 read_utf8 write_utf8 |
| Run R code and record the results | format.xfun_record_results print.xfun_record_results record |
| Print methods for 'record()' | new_record record_print record_print.default |
| Get the relative path of a path relative to a directory | relative_path |
| Rename files with a sequential numeric prefix | rename_seq |
| Get data from a REST API | github_api rest_api rest_api_raw |
| Retry calling a function for a number of times | retry |
| Run 'R CMD check' on the reverse dependencies of a package | compare_Rcheck rev_check |
| Run the commands 'Rscript' and 'R CMD' | Rcmd Rscript |
| Call a function in a new R session via 'Rscript()' | Rscript_call |
| Type a character vector into the RStudio source editor | rstudio_type |
| Test if two paths are the same after they are normalized | same_path |
| An alternative to sessionInfo() to print session information | session_info |
| Set environment variables | set_envvar |
| Shrink images to a maximum width | shrink_images |
| Split a character vector by line breaks | split_lines |
| Split source lines into complete expressions | split_source |
| Strict lists | $.xfun_strict_list as_strict_list print.xfun_strict_list strict_list |
| Strip HTML tags | strip_html |
| Submit a source package to CRAN | submit_cran |
| Run 'system2()' and mark its character output as UTF-8 if appropriate | system3 |
| Use the Tinify API to compress PNG and JPEG images | tinify tinify_dir |
| A simple JSON serializer | json_vector tojson |
| Turn the output of 'str()' into a tree diagram | tree |
| Try an expression and see if it throws an error | try_error |
| Try to evaluate an expression silently | try_silent |
| Upload to an FTP server via 'curl' | upload_ftp upload_win_builder |
| Upload an image to imgur.com | upload_imgur |
| Test if a URL is accessible | url_accessible |
| Extract filenames from a URLs | url_filename |
| Check if the syntax of the code is valid | valid_syntax |
| Partition the YAML metadata and the body in a document | yaml_body |
| Read YAML data | yaml_load |
