Uploads from Xah Lee

Currently Playing: Xah Ep758 JavaScript. Array Sort, Peter Norvig, is Python Acceptable Lisp

Video Summary (Generated by AI, Edited by Human.) • The video focuses on advanced JavaScript coding, specifically demonstrating how to sort objects within an array using the Array.prototype.sort() method (2:07). • The speaker, Xah Lee, begins by explaining the "idiocy" of JavaScript's default sort behavior (6:08), which converts elements to strings and compares them by their UTF-16 code units, leading to unexpected results for numbers (7:06). • He then guides viewers through creating a custom comparison function (known as a "predicate" function (11:46)) to correctly sort an array of objects based on a specific property, like age (30:06). • Throughout the demonstration, Xah Lee also shares his opinions on: • The naming conventions for sort functions, preferring "predicate" over "callback" (11:46-13:11). • Whether JavaScript is a "lisp" (14:04) and delves into a historical anecdote about Peter Norvig calling Python an "acceptable lisp" (18:27). • The characteristics that truly define a lisp (23:18), such as nested syntax, symbols, macros, and predominantly functional programming (26:59). • He concludes by showcasing the completed code for sorting objects and reiterates the importance of understanding JavaScript's quirky sort behavior (34:10). Notes at http://xahlee.info/talk_show/xah_talk_show_ep758.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.