Emacs has often been criticized for failing to provide a more extensive string manipulation API (compared to that of programming languages like Ruby and Perl, for instance). As many programs (extensions) running on top of it are doing quite a lot of string manipulation, having a good string API is important. To compensate the lack of certain primitives in Emacs itself a lot of package authors are using these days packages like s.el or simply adding the string functions they need directly to their packages (to reduce the number of third-party deps).
In Emacs 24.4 finally the situation is improving. Finally, we’re getting
string-suffix-p, which was mysteriously missing even though
has been part of Emacs for years:
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More importantly, Emacs 24.4 ships with a new built-in library called
subr-x, which features
a bunch of other string manipulation functions:
Here’s a brief demo of them in action:
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subr-x is not as extensive as
s.el (and will never be), but
I think that it’s a big step in the right direction. It’s likely that
subr-x will be extended in subsequent Emacs versions and some of the
functions from it will be promoted to
That’s all I have for now. Until next time!