Xah Ep746 JavaScript in depth. Compare nested array and object equality by content.

Описание: Video Summary (Generated by AI, Edited by Human.)

intro. About comparing arrays and objects by their content in JavaScript (0:15).

JavaScript built-in equal operator compare references, not content (0:24).
Intro an isObjectEqual function (0:41). Claims it is the most efficient and correct for this purpose (5:48).
This recursive function compares enumerable properties and handles nested arrays and objects (4:31).

Discusses alternative approach using JSON.stringify to convert arrays/objects to strings for comparison (1:10).
However, the speaker highlights several problems with this method, including:

• Object key order problem (1:41, 39:27).
• undefined and null values problem. (1:51, 40:21).
• Sparse arrays problem. (1:51, 41:12).

• Several digressions.
• "ultimate hacking keyboard" (2:37).
• importance of large fonts for live streams (3:48).
• explain and demo Deno auto-formatter (16:21), and on the history and implications of trailing commas in JavaScript and other programming languages (21:50, 32:02).
• The decline of jQuery's relevance since 2015 (48:02) and touches upon asynchronous JavaScript and Node.js (49:03).

• about writing benchmark using deno. (20:48, 33:19).
• into JavaScript tutorial for further details (44:18).



Notes at
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