Xah Emacs Blog

Update Highlights

• LISP vs WolframLang

• Xah Talk Show 2024-06-11 Ep558, Which is Best Lisp? Common Lisp, Scheme, Elisp, Clojure, Wolfram Language

• Programing language, regarding lisp cons.
• This is the final say.
• The common lispers, have always been, the most idiotic bunch, in the past 30 years as far as i get to know them.

• Lisp cons, to this day, is the most momfaaking idiotic concept in comp sci.
• It is lisp cons, that killed lisp. Except, clojure, which ditched cons entirely.
• Nobody the faak do linked list today.
• It is not in all other langs since y2k.
• Only the lisp fanatics, still like chew it like fine wine, thinking, how great it is or was.

• the way to fix the lisp cons, is to ban any list that is not a proper list.
• that should be done 30 years ago.
• but today, there is more reason to not use lisp list, even proper list, due to parallel computation.

• Guy Steele Says: Don't Iterate, Recurse, and Get rid of lisp cons!

• The Glory of LISP cons

• 2024-10-09
• Emacs: Xah Fly Keys 📦
• added xah-page-up and xah-page-down commands.

• Who is lispm on Hackernews

• Emacs Init: Variable Pitch Mode (Proportional Font)

• 2024-10-07
• Emacs: Xah Fly Keys 📦
• major fix on many commands that works on text block. few months ago made a change so that blank lines containing space or tab is not considered blank. the result is not good. now fixed. also, renamed xah-get-pos-of-block to xah-fly-get-pos-block etc.
• xah-run-current-file-map, py3 changed to run python, not python3.
• fixed a bug in xah-select-text-in-quote.

major bug fix.

• Elisp: Get Text Block 🚀
• Emacs: Delete Text Block 🚀

updates.

• Best Unicode Fonts for Programer

• Emacs Init: Font for Emoji
• Emacs Init: Font for Unicode Symbols
• Emacs Init: Font for Chinese

updates.

• Emacs: Open Python Doc 🚀
• Emacs Jargons (Glossary)
• Emacs: Major Mode
• Elisp: Print Date Time
• Elisp: Parse Date Time

• Elisp: Buffer Functions

• Line Wrap at 80 Chars from Punched Cards

• Emacs Magit Mode Problem

• Elisp: Replacing HTML Entities with Unicode Characters

• Emacs: Replace HTML Entities 🚀

• Emacs: Convert File Line Ending 🚀

• Emacs: Split Window

• 2024-09-27
• Emacs: Xah Fly Keys 📦
• major key reorg. removed most starting with C-x, and other change. see below.
• Removed most keys starting with C-x. Reason is when you do M-x for some rarely used command, the C-x binding shows in minibuffer in precedence over leader key sequence. This makes it harder to know the easier key.
• Removed many C- keys such as C-p for moving cursor right. They were there so that emacs default key users might use them. But those people are not likely to adopt Xah Fly Keys anyway. Beginners simply press arrow keys.
• Added some 10 plus keys for kmacro commands. These are almost never used but good to have keys for the handful advanced emacs users. Each now has a leader key sequence. The exact key is to be changed.

• gnu_emacs_29_keybinding.txt
• Emacs: One Thousand Default Keybinding

(setq word-wrap-by-category t)

• Emacs: Toggle Word Wrap

thanks to jamesni.

• Emacs: Next/Previous User Buffer 🚀

• 2024-09-24
• Emacs: Xah Fly Keys 📦
• added arrow keys to xah-previous-user-buffer xah-next-user-buffer xah-previous-emacs-buffer xah-next-emacs-buffer. you can press arrow keys to repeat. see docstring.

also thanks to emiltoacs for improvement.

• 🆕 Elisp: Join Strings, Codepoints to String
• Elisp: Sequence Join, Convert

• added new function string-replace
• Elisp: String Functions

• Emacs: xah-get-thing.el 📦
• Elisp: Get Text Block 🚀

• Emacs: Latin to Gothic (𝔤𝔬𝔱𝔥𝔦𝔠) 🚀
• Emacs: Latin to Rune (ᚱᚢᚿᛂ) 🚀
• Emacs: Latin to Braille ⠎⠕⠍⠑ 🚀
• Emacs: Convert to Full-Width Characters 🚀

• Xah Emacs Commands

translate-region

subst-char-in-string

;; this is in C
subst-char-in-region

can be used for my asccify command

• Elisp: String Functions

repost.

• Elisp: Destructure Binding (seq-setq, seq-let)

• Xah Talk Show 2024-09-17 Ep586, Emacs Lisp, Rename All Links in Web Root Dir

added a common idiom

• Elisp: Walk Directory, List Files

• 2024-09-16
• Emacs: Xah Fly Keys 📦
• Major change. Removed xah-fly-shared-map. And xah-fly-key-map is now not declared obsolete.
• xah-fly-shared-map was introduced by Will Dey (and Dan Langlois) in 2020-04-18 during the key engine rewrite using set-transient-map.
• The idea of xah-fly-shared-map is that it serves as a parent of xah-fly-command-map and xah-fly-insert-map.
• This allows setting control modifier combinations such as C-t also be part of Xah Fly Keys binding, thus is automatically unbound when the mode is turned off, as it should.
• I think it makes things more complicated than worth.

• Xah Talk Show 2024-09-12 Ep585, Emacs Lisp, Find and Replace in a Dir, and Undo All

• 2024-09-12
• Emacs: Xah Find Replace (xah-find.el) 📦
• xah-find-undo-last-replace new.

new version out. buy it. thanks. Buy Xah Emacs Tutorial

updates

• Emacs Keys: Define Key
• Emacs Keys: Syntax

• Elisp: Hash Table

• Emacs: Xah Fly Keys Escape Key

• Emacs: Input Method

• Emacs Init: Whitespace Mode

• Emacs: Replace HTML Entities 🚀

• Emacs: Insert Emoji
• Emacs: Insert Unicode Character

• Emacs: Show Holidays

• LISP Girl

• Xah Talk Show 2024-08-30 Ep581, Emacs Lisp Coding, Command to Rename Variables, Paul Graham Website Tech 1999

• 2024-08-29
• Emacs: Xah JS Mode (JavaScript) 📦
• xah-js-eval-line and xah-js-eval-region now take universal-argument, to insert result in buffer.

• 2024-08-29
• Emacs: Xah PowerShell Mode 📦
• new. xah-pwsh-eval-region, xah-pwsh-eval-current-line

• 2024-08-29
• Emacs: Xah Wolfram Mode 📦
• xah-wolfram-eval-region and xah-wolfram-eval-current-line can take universal-argument to insert result to buffer.

• Emacs: Xah Toggle Theme 🚀

• Xah Talk Show 2024-08-27 Ep579, Web History WHATWG vs W3C Split, Emacs Lisp HTML Convert PNG to JPG

• Emacs: Real Automatic Save File
• Emacs: #auto-save# (hashtagged filename)
• Emacs: Refresh, Revert File

• Emacs: Zip Dir in Dired 🚀

which editor by default highlight the current line? vscode, sublime, textmate, or other?

updated

• Emacs: Insert Date Time 🚀
• Emacs: Interactive Abbrev 🚀
• Emacs: fido-mode (Minibuffer Name Completion)

• Xah Talk Show 2024-08-22 Ep576, Emacs Lisp Coding, Toggle Theme, Print List, ErgoEmacs, Gun Emoji

updates

• 🆕 Emacs: Xah Fly Keys, How to Indent
• Emacs: Xah Fly Keys, Key for Org-Mode

• Launch Emacs
• Emacs: Start Emacs on MacOS from Terminal

updates

• Emacs: Init File Tutorial
• Emacs: Ignore Init File
• 🆕 Timing Emacs Init
• Emacs in Microsoft Windows FAQ
• 🆕 Linux Tools Needed by Emacs on Windows

• Elisp: Association List
• Elisp: Sequence Join, Convert
• Elisp: Apply Function (List to Args)

• Elisp: load, load-file, autoload
• 🆕 Elisp: Load Path

• Emergency vim
• vim, 3 Decades Pile of History
• History of vi Keys
• Arrow Keys: vim HJKL vs Inverted T
• Interview with Bill Joy (creator of vi)

• LISP Trump

• Emacs Fun Index

updates

• Emacs: Set Default Window Size
• Emacs Init: Sample Init File
• Emacs Init: Set Color Theme
• 🆕 Emacs Init: Set Background Color

• Emacs: Xah Fly Keys, Key for Org-Mode

• Emacs Init: Organize Init File
• Elisp: Get Script Name at Run Time, Call by Relative Path

more updates.

• Elisp: Sequence Functions
• 🆕 Elisp: Sequence Union, Intersection, Difference
• Elisp: Map to Sequence
• Elisp: Sequence Find

• Emacs Regex Quirk: Matching Beginning/End of Line/String/Buffer

• Line Wrap at 80 Chars from Punched Cards

• Emacs: Byte Compile Elisp Files

master emacs lisp loop and iteration. major updates.

• Elisp: Loop
• Elisp: List Iteration
• Elisp: Sequence Iteration
• Elisp: Sequence Filter
• 🆕 Elisp: Foreach (Side-Effect)
• 🆕 Elisp: Sequence Map Insert
• 🆕 Elisp: Map to Sequence
• 🆕 Elisp: Sequence Iteration, Conditional Exit

• Elisp: Exit Loop or Function (throw, catch)

• Xah Talk Show 2024-08-15 Ep575, Emacs Lisp, Command to Add HTML Attribute

• 2024-08-13
• Emacs: Xah Wolfram Mode 📦
• xah-wolfram-eval-region now work on current text block when no text selection.

Emacs org mode security emergency

just org mode is affected, not emacs.

but there's new emacs release, emacs 29.4, that fixed the org mode problem.

• Download Emacs for Windows/Mac

• Xah Talk Show 2024-08-11 Ep573, Emacs Lisp, Validate Matching Brackets, Part 2

• Elisp: Validate Matching Brackets 🚀

• Xah Talk Show 2024-08-10 Ep572, Emacs Lisp, Validate Matching Brackets

updates

• Launch Emacs
• Start Emacs in Microsoft Windows

• Elisp: Sequence Iteration
• Elisp: Buffer Functions

• 2024-07-25
• Emacs: Xah Fly Keys 📦
• xah-close-current-buffer now also record dired buffer, so can xah-open-last-closed

• 2024-07-25
• Emacs: Xah HTML Mode 📦
• new: xah-html-insert-page-template , xah-html-move-text-block

• Xah Talk Show 2024-07-24 Ep566, Emacs Lisp, add twitter cards to 10 thousand files

• Emacs: Jump to Previous Position

• Xah Talk Show 2024-07-22 Ep564, Emacs Lisp Coding, highlight duplicate links

new. pepe anti emacs pill

• Emacs Fun Index

• Xah Talk Show 2024-07-19 Ep563, Emacs Lisp Coding move-html-text-block and random chat

• Emacs Init: Dired Config
• 🆕 Emacs: Dired, Show All Subdirectories 🚀
• 🆕 Xah Dired Toggle Human Readable File Size 🚀

• Emacs: Search Text in Directory

• Emacs: List Matching Lines

• LISP Logo

• Emacs Keys: Change Minor Mode Keys

• Emacs: Open Python Doc 🚀
• Emacs: Insert Random Number or String 🚀

• 2024-07-15
• Emacs: Xah Dired Mode (xah-dired.el) 📦
• xah-dired-toggle-human-readable-size new.
• xah-dired-metadata-remover-path renamed to xah-dired-exiftool-path

• 2024-07-15
• Emacs: Xah HTML Mode 📦
• xah-html-make-citation now use TORTOISE SHELL BRACKET.
• xah-html--get-youtube-id renamed to xah-get-youtube-id.
• xah-normalize-youtube-url new.
• image link functions now use xah-get-image-dimensions instead of calling imagemagick, unless necessary.

minor updates.

• Emacs: Xah Fly Keys Customization
• Emacs: Xah Fly Keys, Setup Keys for Major Mode

• Emacs: Messages Buffer
• Emacs Principle, Command and Keys

• Elisp: Buffer Functions

• Xah Talk Show 2024-07-07 Ep560, Emacs Lisp Coding, Get Youtube Video Thumbnail

updates

• 🆕 Emacs: Shell on Microsoft Windows
• Emacs: Run Shell in Emacs
• Emacs Init: Change Default Shell (PowerShell)
• Emacs: eshell

• Emacs: Keyboard Macro Commands
• Emacs: ido mode 👎
• Emacs Init: Save Cursor Position

updates

• dired-do-find-marked-files open all marked files.
• Emacs Init: Dired Config Emacs: File Manager, dired
• Emacs: shell vs eshell vs term

• 2024-07-03
• Emacs: Xah Fly Keys 📦
• xah-shrink-whitespaces minor refactor. removed xah-delete-blank-lines, xah-fly-delete-spaces

• 2024-07-05
• Emacs: Xah HTML Mode 📦
• xah-html-youtube-normalize-url now support query string.
• xah-html-keyboard-shortcut-markup better, now normalize command key opt key etc.
• xah-html-pop-back-source-code, xah-html-toggle-syntax-color-tags changed cursor position requirement. experimental.
• xah-html-change-current-tag changed cursor position requirement.

major updates

• 🆕 Emacs Init: Mouse Button Syntax
• Emacs Init: Mouse Wheel Config
• Emacs: Mouse Wheel Commands
• 🆕 Emacs Init: Disable Mouse Highlight
• 🆕 Emacs Init: Define Command for Mouse Click
• Emacs: Mouse Click to Highlight Matching Words