Unicode fundamentals: code points, encoding (UTF-8/UTF-16), grapheme clusters, normalization, locale pitfalls (Turkish dotless i, Cyrillic variants), emoji internals (ZWJ, modifiers, flags), and more

Collection of interesting information on monospace fonts.

This article explains how to correctly handle filenames in Bourne shells (the primary shell of Unix/Linux/POSIX systems), based on the issues discussed in ‘Fixing Unix/Linux/Filenames’. Many programs fail to work properly on filenames that include spaces, begin with dash (-), include newlines, and so on, because developers don’t know how to do it properly. Many texts, even good ones, get this wrong.

Explanation of UTF-8 with lots of diagrams.

An overview on unicode codepoint combinations and how they apply to emojis.