Emacs Lisp Cheat Sheet
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Special form
special form has its own rule for which arguments are evaluated
| Purpose | Forms |
| Definition | defconst defun defvar |
| Binding constructs | let let* function |
| Conditional evaluation | and cond if or |
| Sequential evaluation | prog1 prog2 progn |
| Iteration | while function |
| Syntactic extension | defmacro |
| Quoting | quote |
| Assignment | setq setq-default |
| Nonlocal Exits | catch condition-case unwind-protect |
| Save | save-current-buffer save-excursion save-restriction save-window-excursion |
| Other | interactive track-mouse with-output-to-temp-buffer |
Standard Library
Including function, variable, command, option, macro, Special Form
Number
Emacs supports two numeric data types: integers and floating point numbers
| Category | Functions Variable |
| Integer Basics | most-positive-fixnum most-negative-fixnum |
| Floating Point Basics | logb float-e float-pi |
| Type Predicate Test | floatp integerp numberp wholenump zerop |
| Comparison | = eql /= < <= > >= max min abs |
| Conversions | float truncate floor ceiling round |
| Arithmetic Operations | 1+ 1- + - * / % mod |
| Rounding Operations | ffloor fceiling ftruncate fround |
| Bitwise Operations | lsh ash logand logior logxor lognot |
| Mathematical Functions | sin cos tan asin acos atan exp log log10 expt sqrt |
| Random Numbers | random |
String and Character
A string in Emacs Lisp is an array that contains an ordered sequence of characters
| Category | Functions Variable |
| Predicates for Strings | stringp string-or-null-p char-or-string-p |
| Creating Strings | make-string string substring substring-no-properties concat split-string split-string-default-separators |
| Modifying Strings | store-substring clear-string |
| Comparison | char-equal string= string-equal string< string-lessp compare-strings assoc-string |
| Conversion | number-to-string string-to-number char-to-string string-to-char |
| Formatting Strings | format |
| Case Conversion | downcase upcase capitalize upcase-initials |
| The Case Table | case-table-p set-standard-case-table standard-case-table current-case-table set-case-table with-case-table ascii-case-table set-case-syntax-pair set-case-syntax-delims set-case-syntax describe-buffer-case-table |
Tip: you can also use a modern string manipulation library with s.el
List
Lists are built up from cons cells
| Category | Functions Variable |
| List-related Predicates | consp atom listp nlistp null |
| List Elements | car cdr car-safe cdr-safe pop nth nthcdr last safe-length caar cadr cadr cadr butlast nbutlast |
| Building Lists | cons list make-list append reverse copy-tree number-sequence |
| List Variables | push add-to-list add-to-ordered-list |
| Modifying Lists | setcar setcdr nconc nreverse sort |
| Sets And Lists | memq delq remq memql member delete remove member-ignore-case delete-dups |
| Association Lists | assoc rassoc sassq rassq assoc-default copy-alist assq-delete-all rassq-delete-all |
| Rings | make-ring ring-p ring-size ring-length ring-elements ring-copy ring-empty-p ring-ref ring-insert ring-remove ring-insert-at-beginning |
Tip: you can benefit from a modern list manipulation api with dash.el
Vector
see seq.el that iterates over sequences, and so vectors.
| Category | Functions Variable |
| Vector Functions | vectorp vector make-vector vconcat |
| Bool-vectors | make-bool-vector bool-vector-p |
Sequence
sequence type is the union of two other Lisp types: lists and arrays. While array has four types, all one-dimensional: strings, vectors, bool-vectors, char-tables.
| Category | Functions Variable |
| Sequence Functions | sequencep length elt copy-sequence |
| Array Functions | arrayp aref aset fillarray |
| Char-Tables | make-char-table char-table-p char-table-subtype char-table-parent set-char-table-parent char-table-extra-slot set-char-table-extra-slot char-table-range set-char-table-range map-char-table |
Hash Tables
| Category | Functions Variable |
| Creating Hash | make-hash-table makehash |
| Hash Access | gethash puthash remhash clrhash maphash |
| Defining Hash | define-hash-table-test sxhashsxhash |
| Other Hash | hash-table-p copy-hash-table hash-table-count hash-table-test hash-table-weakness hash-table-rehash-size hash-table-rehash-threshold hash-table-size |
Symbols
| Category | Functions Variable |
| Predicates for symbols | symbolp |
| Creating Symbols | symbol-name make-symbol intern intern-soft obarray mapatoms unintern |
| Property Lists | symbol-plist setplist get put plist-get plist-put lax-plist-get lax-plist-put plist-member |
Minibuffer
A minibuffer is a special buffer that Emacs commands use to read arguments more complicated than the single numeric prefix argument.
| Category | Functions Variable |
| Text from Minibuffer | read-from-minibuffer read-string read-regexp minibuffer-allow-text-properties minibuffer-local-map read-no-blanks-input minibuffer-local-ns-map |
| Object from Minibuffer | read-minibuffer eval-minibuffer edit-and-eval-command |
| Minibuffer History | add-to-history history-add-new-input history-length history-delete-duplicates minibuffer-history query-replace-history file-name-history buffer-name-history regexp-history extended-command-history shell-command-history read-expression-history |
| Basic Completion | try-completion all-completions test-completion completion-boundaries completion-ignore-case completion-regexp-list lazy-completion-table completion-in-region |
| Minibuffer Completion | completing-read |
| Completion Commands | minibuffer-completion-table minibuffer-completion-predicate minibuffer-completion-confirm minibuffer-confirm-exit-commands minibuffer-complete-word minibuffer-complete minibuffer-complete-and-exit minibuffer-completion-help display-completion-list completion-auto-help minibuffer-local-completion-map minibuffer-local-must-match-map minibuffer-local-filename-completion-map minibuffer-local-filename-must-match-map |
| High-Level Completion | read-buffer read-buffer-function read-buffer-completion-ignore-case read-command read-variable read-color |
| Reading File Names | read-file-name read-file-name-function read-file-name-completion-ignore-case read-directory-name insert-default-directory read-shell-command minibuffer-local-shell-command-map |
| Completion Styles | completion-styles completion-styles-alist |
| Programmed Completion | completion-table-dynamic completion-annotate-function |
| Yes-or-No Queries | y-or-n-p y-or-n-p-with-timeout yes-or-no-p |
| Multiple Queries | map-y-or-n-p |
| Reading a Password | read-passwd |
| Minibuffer Commands | exit-minibuffer self-insert-and-exit previous-history-element next-history-element previous-matching-history-element next-matching-history-element |
| Minibuffer Contents | minibuffer-prompt minibuffer-prompt-end minibuffer-prompt-width minibuffer-contents minibuffer-contents-no-properties minibuffer-completion-contents delete-minibuffer-contents |
| Minibuffer Windows | active-minibuffer-window minibuffer-window set-minibuffer-window window-minibuffer-p minibuffer-window-active-p |
| Recursive Mini | minibuffer-depth enable-recursive-minibuffers |
| Minibuffer Miscellany | minibufferp minibuffer-setup-hook minibuffer-exit-hook minibuffer-help-form minibuffer-scroll-window minibuffer-selected-window max-mini-window-height |
Keymaps
| Category | Functions Variable |
| Key Sequences | kbd |
| Format of Keymaps | keymapp |
| Creating Keymaps | make-sparse-keymap make-keymap copy-keymap |
| Inheritance and Keymaps | keymap-parent set-keymap-parent |
| Prefix Keys | define-prefix-command |
| Active Keymaps | current-active-maps key-binding |
| Controlling the Active Keymaps | global-map current-global-map current-local-map current-minor-mode-maps use-global-map use-local-map minor-mode-map-alist minor-mode-overriding-map-alist overriding-local-map overriding-terminal-local-map overriding-local-map-menu-flag special-event-map emulation-mode-map-alists |
| Functions for Key Lookup | lookup-key undefined local-key-binding global-key-binding minor-mode-key-binding meta-prefix-char |
| Changing Key Bindings | define-key substitute-key-definition suppress-keymap |
| Remapping Commands | command-remapping |
| Translation Keymaps | input-decode-map local-function-key-map key-translation-map |
| Key Binding Commands | global-set-key global-unset-key local-set-key local-unset-key |
| Scanning Keymaps | accessible-keymaps map-keymap where-is-internal describe-bindings |
| Menu Keymaps | keymap-prompt |
| Menus and the Keyboard | menu-prompt-more-char |
| Menu Bar | menu-bar-final-items menu-bar-update-hook |
| Tool Bar | tool-bar-map tool-bar-add-item tool-bar-add-item-from-menu tool-bar-local-item-from-menu auto-resize-tool-bars auto-raise-tool-bar-buttons tool-bar-button-margin tool-bar-button-relief tool-bar-border |
| Modifying Menus | define-key-after |
File
See: f.el, a modern library for working with files and directories.
| Category | Functions Variable |
| Visiting Files | find-file find-file-literally find-file-noselect find-file-other-window find-file-read-only view-file find-file-wildcards find-file-hook find-file-not-found-functions find-file-literally create-file-buffer after-find-file |
| Saving Buffers | save-buffer save-some-buffers write-file write-file-functions write-contents-functions before-save-hook after-save-hook file-precious-flag require-final-newline |
| Reading from Files | insert-file-contents insert-file-contents-literally |
| Writing to Files | append-to-file write-region with-temp-file |
| File Locks | file-locked-p lock-buffer unlock-buffer ask-user-about-lock |
| Information about Files | file-exists-p file-readable-p file-executable-p file-writable-p file-accessible-directory-p access-file file-ownership-preserved-p file-newer-than-file-p file-symlink-p file-directory-p file-regular-p file-truename file-chase-links file-modes file-nlinks file-attributes locate-file executable-find |
| Changing Files | add-name-to-file rename-file copy-file make-symbolic-link delete-file set-file-modes set-default-file-modes default-file-modes read-file-modes file-modes-symbolic-to-number set-file-times |
| File Names | file-name-directory file-name-nondirectory file-name-sans-versions file-name-extension file-name-sans-extension file-name-absolute-p file-relative-name file-name-as-directory directory-file-name abbreviate-file-name expand-file-name default-directory substitute-in-file-name make-temp-file make-temp-name temporary-file-directory small-temporary-file-directory file-name-all-completions file-name-completion completion-ignored-extensions convert-standard-filename |
| Contents of Directories | directory-files directory-files-and-attributes file-expand-wildcards insert-directory insert-directory-program |
| Create/Delete Dirs | make-directory copy-directory delete-directory |
| Magic File Names | inhibit-file-name-handlers inhibit-file-name-operation find-file-name-handler file-local-copy file-remote-p unhandled-file-name-directory |
| Format Conversion | format-alist buffer-file-format format-write-file format-find-file format-insert-file buffer-auto-save-file-format write-region-annotate-functions write-region-post-annotation-function after-insert-file-functions |
Buffer
buffer is a lisp object containing text to be edited
| Category | Functions Variable |
| Basic | bufferp current-buffer set-buffer save-current-buffer with-current-buffer with-temp-buffer |
| Buffer Names | buffer-name rename-buffer get-buffer generate-new-buffer-name |
| Buffer File Name | buffer-file-name buffer-file-name buffer-file-truename buffer-file-number get-file-buffer find-buffer-visting set-visted-file-name list-buffers-directory |
| Buffer Modification | buffer-modified-p set-buffer-modified-p restore-buffer-modified-p not-modified buffer-modified-tick buffer-chars-modified-tick |
| Buffer Modification Time | verify-visited-file-modtime clear-visited-file-modtime visited-file-modtime set-visited-file-modtime ask-user-about-supersession-threat |
| Read-Only Buffers | buffer-read-only inhibit-read-only toggle-read-only barf-if-buffer-read-only |
| Buffer List | buffer-list other-buffer last-buffer bury-buffer unbury-buffer |
| Creating Buffers | get-buffer-creat generate-new-buffer |
| Killing Buffers | kill-buffer kill-buffer-query-function kill-buffer-hook buffer-offer-save buffer-save-without-query buffer-live-p |
| Indirect Buffers | make-indirect-buffer clone-indirect-buffer buffer-base-buffer |
| Swapping Text Between Two Buffers | buffer-swap-text |
| Buffer Gap | gap-position gap-size |
Windows
| Category | Functions Variable |
| Basic Windows | windowp |
| Splitting Windows | split-window split-window-vertically split-window-keep-point split-window-horizontally one-window-p |
| Deleting Windows | window-live-p delete-window delete-other-windows delete-windows-on |
| Selecting Windows | selected-window select-window save-selected-window with-selected-window get-lru-window get-largest-window get-window-with-predicate |
| Cyclic Window Ordering | next-window previous-window other-window walk-windows window-list |
| Buffers and Windows | set-window-buffer buffer-display-count window-buffer get-buffer-window get-buffer-window-list buffer-display-time |
| Displaying Buffers | switch-to-buffer switch-to-buffer-other-window pop-to-buffer replace-buffer-in-windows |
| Choosing Window | display-buffer display-buffer-reuse-frames pop-up-windows split-window-preferred-function split-window-sensibly split-height-threshold split-width-threshold even-window-heights pop-up-frames pop-up-frame-function pop-up-frame-alist special-display-buffer-names special-display-regexps special-display-p special-display-function special-display-popup-frame special-display-frame-alist same-window-buffer-names same-window-regexps same-window-p display-buffer-function |
| Dedicated Windows | window-dedicated-p set-window-dedicated-p |
| Window Point | window-point set-window-point window-point-insertion-type |
| Window Start and End | window-start window-end set-window-start pos-visible-in-window-p window-line-height |
| Textual Scrolling | scroll-up scroll-down scroll-other-window other-window-scroll-buffer scroll-margin scroll-conservatively scroll-down-aggressively scroll-up-aggressively scroll-step scroll-preserve-screen-position next-screen-context-lines recenter |
| Vertical Scrolling | window-vscroll set-window-vscroll auto-window-vscroll |
| Horizontal Scrolling | scroll-left scroll-right window-hscroll set-window-hscroll |
| Size of Window | window-height window-body-height window-full-height-p window-width window-full-width-p window-edges window-inside-edges window-pixel-edges window-inside-pixel-edges |
| Resizing Windows | enlarge-window enlarge-window-horizontally shrink-window shrink-window-horizontally adjust-window-trailing-edge fit-window-to-buffer shrink-window-if-larger-than-buffer window-size-fixed window-min-height window-min-width balance-windows balance-windows-area |
| Coordinates and Windows | window-at coordinates-in-window-p |
| Window Tree | window-tree |
| Window Configurations | current-window-configuration set-window-configuration save-window-excursion window-configuration-p compare-window-configurations window-configuration-frame |
| Window Parameters | window-parameter window-parameters set-window-parameter |
| Window Hooks | window-scroll-functions window-size-change-functions window-configuration-change-hook |
Frames
| Category | Functions Variable |
| Creating Frames | make-frame before-make-frame-hook after-make-frame-functions frame-inherited-parameters |
| Multiple Terminals | terminal-name terminal-list get-device-terminal delete-terminal delete-terminal-functions make-frame-on-display x-display-list x-open-connection x-close-connection |
| Frame Parameters | frame-parameter frame-parameters modify-frame-parameters set-frame-parameter modify-all-frames-parameters initial-frame-alist minibuffer-frame-alist default-frame-alist blink-cursor-alist cursor-in-non-selected-windows set-frame-position frame-height frame-width frame-pixel-height frame-pixel-width frame-char-height frame-char-width set-frame-size set-frame-height set-frame-width x-parse-geometry |
| Terminal Parameters | terminal-parameters terminal-parameter set-terminal-parameter |
| Frame Titles | frame-title-format icon-title-format multiple-frames |
| Deleting Frames | delete-frame frame-live-p |
| Finding All Frames | frame-list visible-frame-list next-frame previous-frame |
| Frames and Windows | window-frame frame-first-window frame-selected-window set-frame-selected-window |
| Minibuffers and Frames | default-minibuffer-frame |
| Input Focus | selected-frame select-frame-set-input-focus select-frame handle-switch-frame redirect-frame-focus focus-follows-mouse |
| Visibility of Frames | make-frame-visible make-frame-invisible iconify-frame frame-visible-p |
| Raising and Lowering | raise-frame lower-frame minibuffer-auto-raise |
| Frame Configurations | current-frame-configuration set-frame-configuration |
| Mouse Tracking | track-mouse |
| Mouse Position | mouse-position mouse-position-function set-mouse-position mouse-pixel-position set-mouse-pixel-position |
| Pop-Up Menus | x-popup-menu |
| Dialog Boxes | x-popup-dialog |
| Pointer Shape | void-text-area-pointer x-pointer-shape x-sensitive-text-pointer-shape |
| Window System Selections | x-set-selection x-get-selection x-get-cut-buffer x-set-cut-buffer selection-coding-system x-select-enable-clipboard |
| Color Names | color-defined-p defined-colors color-supported-p color-gray-p color-values |
| Text Terminal Colors | tty-color-define tty-color-clear tty-color-alist tty-color-approximate tty-color-translate |
| Resources | x-get-resource x-resource-class x-resource-name inhibit-x-resources |
| Display Feature Testing | display-popup-menus-p display-graphic-p display-mouse-p display-color-p display-grayscale-p display-supports-face-attributes-p display-selections-p display-images-p display-screens display-pixel-height display-pixel-width display-mm-height display-mm-width display-mm-dimensions-alist display-backing-store display-save-under display-planes display-visual-class display-color-cells x-server-version x-server-vendor |
Positions
A position is the index of a character in the text of a buffer.
| Category | Functions Variable |
| Point | point point-min point-max buffer-end buffer-size |
| Motion | goto-char forward-char backward-char |
| forward-word backward-word words-include-escapes inhibit-field-text-motion | |
| beginning-of-buffer end-of-buffer | |
| beginning-of-line line-beginning-position end-of-line line-end-position forward-line count-lines line-number-at-pos | |
| vertical-motion count-screen-lines move-to-window-line compute-motion | |
| forward-list backward-list up-list down-list forward-sexp backward-sexp beginning-of-defun end-of-defun defun-prompt-regexp open-paren-in-column-0-is-defun-start beginning-of-defun-function end-of-defun-function | |
| skip-chars-forward skip-chars-backward | |
| Excursions | save-excursion |
| Narrowing | narrow-to-region narrow-to-page widen save-restriction |
Marker
A marker is a Lisp object used to specify a position in a buffer relative to the surrounding text.
| Category | Functions Variable |
| Predicates on Markers | markerp integer-or-marker-p number-or-marker-p |
| Creating Markers | make-marker point-marker point-min-marker point-max-marker copy-marker |
| Information from Markers | marker-position marker-buffer buffer-has-markers-at |
| Marker Insertion Types | set-marker-insertion-type marker-insertion-type |
| Moving Markers | set-marker move-marker |
| The Mark | mark mark-marker set-mark push-mark pop-mark transient-mark-mode mark-even-if-inactive deactivate-mark deactivate-mark mark-active activate-mark-hook deactivate-mark-hook handle-shift-selection mark-ring mark-ring-max |
| The Region | region-beginning region-end use-region-p |
Text
Text is manipulated through Buffer object with point and marker.
| Category | Function Variable |
| Near Point | char-after char-before following-char preceding-char bobp eobp bolp eolp |
| Examining Buffer Contents | buffer-substring buffer-substring-no-properties buffer-string filter-buffer-substring filter-buffer-substring-function buffer-substring-filters current-word thing-at-point |
| Comparing Text | compare-buffer-substrings |
| Inserting Text | insert insert-before-markers insert-char insert-buffer-substring insert-buffer-substring-no-properties |
| User-Level Insertion Commands | insert-buffer self-insert-command newline overwrite-mode |
| Deleting Text | erase-buffer delete-region delete-and-extract-region delete-char delete-backward-char backwar-delete-char-untabify backward-delete-char-untabify-method |
| User-Level Deletion Commands | delete-horizontal-space delete-indentation fixup-whitespace just-one-space delete-blank-lines |
| The Kill Ring | kill-region kill-read-only-ok copy-region-as-kill
insert-for-yank insert-buffer-substring-as-yank yank yank-pop yank-undo-function current-kill kill-new kill-append interprogram-paste-function interprogram-cut-function kill-ring kill-ring-yank-pointer kill-ring-max |
| Undo | buffer-undo-list undo-boundary undo-in-progress primitive-undo |
| Maintaining Undo Lists | buffer-enable-undo buffer-disable-undo undo-limit undo-strong-limit undo-outer-limit undo-ask-before-discard |
| Filling | fill-paragraph fill-region fill-individual-paragraphs fill-individual-varying-indent fill-region-as-paragraph justify-current-line default-justification current-justification sentence-end-double-space sentence-end-without-period sentence-end-without-space fill-paragraph-function fill-forward-paragraph-function use-hard-newlines |
| Margins | fill-prefix fill-column set-left-margin set-right-margin current-left-margin current-fill-column move-to-left-margin delete-to-left-margin indent-to-left-margin left-margin fill-nobreak-predicate |
| Adaptive Fill | adaptive-fill-mode fill-context-prefix adaptive-fill-regexp adaptive-fill-first-line-regexp adaptive-fill-function |
| Auto Filling | auto-fill-function normal-auto-fill-function auto-fill-chars |
| Sorting | sort-subr sort-fold-case sort-regexp-fields sort-regexp-fields sort-paragraphs sort-pages sort-fields sort-numeric-fields sort-numeric-base sort-columns |
| Columns | current-column move-to-column |
| Indentation | current-indentation indent-to indent-tabs-mode indent-line-function indent-according-to-mode indent-for-tab-command newline-and-indent reindent-then-newline-and-indent indent-region indent-region-function indent-rigidly indent-code-rigidly indent-relative indent-relative-maybe tab-to-tab-stop tab-stop-list back-to-indentation backward-to-indentation forward-to-indentation |
| Case | capitalize-region downcase-region upcase-region capitalize-word downcase-word upcase-word |
| Text Properties | get-text-property get-char-property get-char-property-and-overlay char-property-alias-alist text-properties-at default-text-properties put-text-property add-text-properties remove-text-properties remove-list-of-text-properties set-text-properties propertize next-property-change previous-property-change next-single-property-change previous-single-property-change next-char-property-change previous-char-property-change next-single-char-property-change previous-single-char-property-change text-property-any text-property-not-all inhibit-point-motion-hooks show-help-function text-property-default-nonsticky insert-and-inherit insert-before-markers-and-inherit buffer-access-fontify-functions buffer-access-fontified-property mouse-on-link-p field-beginning field-end field-string field-string-no-properties delete-field constrain-to-field |
| Substituting | subst-char-in-region translate-region |
| Transposition | transpose-regions |
| Registers | register-alist get-register set-register view-register insert-register |
| Base 64 | base64-encode-region base64-encode-string base64-decode-region base64-decode-string |
| MD5 Checksum | md5 |
| Atomic Change | prepare-change-group activate-change-group accept-change-group cancel-change-group |
| Change Hooks | before-change-functions after-change-functions combine-after-change-calls first-change-hook inhibit-modification-hooks |
Searching and Matching
| Category | Function Variable |
| String Search | search-forward search-backward word-search-forward word-search-forward-lax word-search-backward word-search-backward-lax |
| Searching and Case | Case-independent or case-significant searching.
case-fold-search case-replace |
| Regular Expressions | regexp-quote regexp-opt regexp-opt-depth |
| Regexp Search | re-search-forward re-search-backward string-match string-match-p looking-at looking-back looking-at-p search-spaces-regexp |
| POSIX Regexps | posix-search-forward posix-search-backward posix-looking-at posix-string-match |
| Match Data | replace-match match-substitute-replacement match-string match-string-no-properties match-beginning match-end match-data set-match-data save-match-data |
| Search and Replace | replace-regexp-in-string perform-replace query-replace-map |
| Standard Regexps | page-delimiter paragraph-separate paragraph-start sentence-end sentence-end |
Processes
| Category | Functions Variable |
| Process Predicate | processp |
| Subprocess Creation | exec-suffixes exec-directory exec-path |
| Shell Arguments | shell-quote-argument split-string-and-unquote combine-and-quote-strings |
| Synchronous Processes | call-process process-file process-file-side-effects call-process-region call-process-shell-command process-file-shell-command shell-command-to-string process-lines |
| Asynchronous Processes | start-process start-file-process start-process-shell-command start-file-process-shell-command process-connection-type |
| Deleting Processes | delete-exited-processes delete-process |
| Process Information | list-processes process-list get-process process-command process-contact process-id process-name process-status process-type process-exit-status process-tty-name process-coding-system set-process-coding-system process-get process-put process-plist set-process-plist |
| Input to Processes | process-send-string process-send-region process-send-eof process-running-child-p |
| Signals to Processes | interrupt-process kill-process quit-process stop-process continue-process signal-process |
| Output from Processes | process-adaptive-read-buffering process-buffer process-mark set-process-buffer get-buffer-process set-process-filter process-filter accept-process-output |
| Sentinels | set-process-sentinel process-sentinel waiting-for-user-input-p |
| Query Before Exit | process-query-on-exit-flag set-process-query-on-exit-flag process-kill-without-query |
| System Processes | list-system-processes process-attributes |
| Transaction Queues | tq-create tq-enqueue tq-close |
| Network | open-network-stream |
| Datagrams | process-datagram-address set-process-datagram-address |
| Low-Level Network | make-network-process set-network-process-option |
| Misc Network | network-interface-list network-interface-info format-network-address |
| Serial Ports | serial-term make-serial-process serial-process-configure |
| Byte Packing | bindat-unpack bindat-get-field bindat-length bindat-pack bindat-ip-to-string |
System Interface
| Category | Functions Variable |
| Starting Up | inhibit-startup-screen initial-buffer-choice inhibit-startup-echo-area-message initial-scratch-message site-run-file inhibit-default-init before-init-hook after-init-hook emacs-startup-hook user-init-file user-emacs-directory term-file-prefix term-setup-hook command-line command-line-processed command-switch-alist command-line-args command-line-args-left command-line-functions |
| Getting Out | kill-emacs kill-emacs-query-functions kill-emacs-hook suspend-emacs suspend-hook suspend-resume-hook suspend-tty resume-tty controlling-tty-p suspend-frame |
| System Environment | system-configuration system-type system-name mail-host-address getenv setenv process-environment initial-environment path-separator parse-colon-path invocation-name invocation-directory
installation-directory load-average emacs-pid emacs-pid |
| User Identification | init-file-user user-mail-address user-login-name user-real-login-name user-full-name user-real-uid user-uid |
| Time of Day | current-time-string current-time current-time-zone set-time-zone-rule float-time |
| Time Conversion | decode-time encode-time |
| Time Parsing | date-to-time format-time-string seconds-to-time format-seconds |
| Processor Run Time | emacs-uptime get-internal-run-time emacs-init-time |
| Time Calculations | time-less-p time-subtract time-add time-to-days time-to-day-in-year date-leap-year-p |
| Timers | run-at-time timer-max-repeats with-timeout cancel-timer |
| Idle Timers | run-with-idle-timer current-idle-time |
| Terminal Input | set-input-mode current-input-mode recent-keys open-dribble-file |
| Terminal Output | baud-rate send-string-to-terminal open-termscript |
| Sound Output | play-sound play-sound-file play-sound-functions |
| X11 Keysyms | system-key-alist x-alt-keysym x-meta-keysym x-hyper-keysym x-super-keysym |
| Batch Mode | noninteractive |
| Session Management | emacs-save-session-functions |
Display
| Category | Functions Variable |
| Refresh Screen | redraw-frame redraw-display no-redraw-on-reenter |
| Forcing Redisplay | redisplay force-window-update redisplay-dont-pause redisplay-preemption-period |
| Truncation | truncate-lines truncate-partial-width-windows wrap-prefix line-prefix cache-long-line-scans |
| The Echo Area | message with-temp-message message-or-box message-box display-message-or-buffer current-message make-progress-reporter progress-reporter-update progress-reporter-force-update progress-reporter-done dotimes-with-progress-reporter message-log-max cursor-in-echo-area echo-area-clear-hook echo-keystrokes message-truncate-lines cursor-in-echo-area echo-area-clear-hook echo-keystrokes message-truncate-lines |
| Warnings | display-warning lwarn warn warning-levels warning-prefix-function warning-series warning-fill-prefix warning-type-format warning-minimum-level warning-minimum-log-level warning-suppress-types warning-suppress-log-types |
| Invisible Text | buffer-invisibility-spec add-to-invisibility-spec remove-from-invisibility-spec invisible-p |
| Selective Display | selective-display selective-display-ellipses |
| Temporary Displays | with-output-to-temp-buffer temp-buffer-show-function temp-buffer-setup-hook temp-buffer-show-hook momentary-string-display |
| Overlays | overlayp make-overlay overlay-start overlay-end overlay-buffer delete-overlay move-overlay remove-overlays copy-overlay overlay-recenter overlay-get overlay-put overlay-properties overlays-at overlays-in next-overlay-change previous-overlay-change |
| Width | char-width string-width truncate-string-to-width |
| Faces | facep defface |
| frame-background-mode | |
| font-family-list underline-minimum-offset x-bitmap-file-path bitmap-spec-p | |
| set-face-attribute face-attribute face-attribute-relative-p face-all-attributes merge-face-attribute set-face-foreground set-face-background set-face-stipple set-face-font set-face-bold-p set-face-italic-p set-face-underline-p set-face-inverse-video-p | |
| invert-face face-remapping-alist face-remap-add-relative face-remap-remove-relative face-remap-set-base face-remap-reset-base | |
| make-face face-list copy-face face-id face-documentation face-equal face-differs-from-default-p define-obsolete-face-alias | |
| fontification-functions | |
| face-font-family-alternatives face-font-selection-order face-font-registry-alternatives | |
| scalable-fonts-allowed face-font-rescale-alist x-list-fonts x-family-fonts font-list-limit | |
| create-fontset-from-fontset-spec set-fontset-font char-displayable-p | |
| fontp font-at font-spec font-put find-font list-fonts font-get font-face-attributes font-xlfd-name | |
| Fringes | fringes-outside-margins left-fringe-width right-fringe-width set-window-fringes window-fringes indicate-empty-lines indicate-buffer-boundaries fringe-indicator-alist overflow-newline-into-fringe fringe-cursor-alist fringe-bitmaps-at-pos define-fringe-bitmap destroy-fringe-bitmap set-fringe-bitmap-face overlay-arrow-string overlay-arrow-position overlay-arrow-variable-list |
| Scroll Bars | frame-current-scroll-bars set-window-scroll-bars window-scroll-bars scroll-bar-mode window-current-scroll-bars scroll-bar-width |
| Display Property | left-margin-width right-margin-width set-window-margins window-margins |
| Images | image-types image-library-alist image-type-available-p image-mask-p create-image defimage find-image image-load-path image-load-path-for-library insert-image insert-sliced-image put-image remove-images image-size max-image-size image-refresh clear-image-cache image-cache-eviction-delay |
| Buttons | define-button-type make-button insert-button make-text-button insert-text-button button-start button-end button-get button-put button-activate button-label button-type button-has-type-p button-at button-type-put button-type-get button-type-subtype-p push-button forward-button backward-button next-button previous-button |
| Abstract Display | ewoc-create ewoc-buffer ewoc-get-hf ewoc-set-hf ewoc-enter-first ewoc-enter-last ewoc-enter-before ewoc-enter-after ewoc-prev ewoc-next ewoc-nth ewoc-data ewoc-set-data ewoc-locate ewoc-location ewoc-goto-prev ewoc-goto-next ewoc-goto-node ewoc-refresh ewoc-invalidate ewoc-delete ewoc-filter ewoc-collect ewoc-map |
| Blinking | blink-paren-function blink-matching-paren blink-matching-paren-distance blink-matching-delay blink-matching-open |
| Usual Display | ctl-arrow tab-width |
| Display Tables | make-display-table display-table-slot set-display-table-slot describe-display-table describe-current-display-table window-display-table set-window-display-table buffer-display-table standard-display-table make-glyph-code glyph-char glyph-face glyph-table create-glyph |
| Beeping | ding beep visible-bell ring-bell-function |
| Window Systems | window-system initial-window-system window-system window-setup-hook |
Third party libraries
s.el, a string manipulation library
s.el is a modern string manipulation api. It's available on marmalade and Melpa.
dash.el, a modern list library
dash.el is a modern list library for emacs. It's available on marmalade and Melpa.