As a speaker of Greek, I’ve been fixing issues in the handling of non-ASCII characters for over 40 years, using techniques ranging from simple lookup tables to dynamic patching of in-memory images. Here’s how I debugged and fixed the handling of UTF-8 characters in the
git grepcommand, which was broken for almost a decade.
Source: How I fixed git-grep macOS UTF-8 support, an article by Diomidis Spinellis.
In numerical linear algebra we are concerned with solving linear algebra problems accurately and efficiently and understanding the sensitivity of the problems to perturbations. We describe seven sins, whereby accuracy or efficiency is lost or misleading information about sensitivity is obtained.
Source: Seven Sins of Numerical Linear Algebra, an article by Nick Higham.
egrep and fgrepWhat's special about GNU Grep 3.8 is that its version of
egrepandfgrepnow print an extra message when you run them. Specifically, these messages 'warn' (ie nag) you to stop using them and use 'grep -E' and 'grep -F' instead.
Source: We are stuck with egrep and fgrep (unless you like beating people), an article by Chris Siebenmann.