Uploads from Xah Lee

Currently Playing: Xah Ep740 Learning Fsharp. Write a Find Replace Script. Part 3.

Write a find and replace script, similar to Unix's sed command, but with more features (0:42). Planned features include: Optional backup. backup with current datetime stamp. (1:06). Regular expression support (1:15). Ability to handle multiple find and replace pairs in one go (1:18). Emacs lisp version (2:07) and Golang, Python, Perl, Emacs Lisp, and Wolfram Language (2:32). Current Script Overview. (3:39). How to get the current datetime in fsharp. (6:40). Exploring different date and time formats, including ISO 8601 (11:02) and a programmer-friendly format (21:51). A digression on the complexity of date and time in programming due to calendars and astronomy (14:17). How to copy file.(32:35). Learning fsharp: how to count occurrence in replace string. Comparing old and new string content (42:48), ask grok AI (43:13) and encountering issues with AI answer (47:50, 55:08, 1:02:02). bad AI example of leaky recursive function. (54:22). Notes at http://xahlee.info/talk_show/xah_talk_show_ep740.html If browser says security error, that is because it auto changes URL from HTTP to HTTPS. It's a way to censor 22 million old websites. Remove the S in HTTPS. Or use brave browser or safari.