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I took Prof. Gallier (the author of this document)'s class when I was a graduate student at Penn. http://www.cis.upenn.edu/~jean/home.html

It is one of the class I enjoyed the most when I was there. Some of his other books are quite enjoyable as well.

Dr. Gallier's PhD work was focused on logic, but his current research has a lot to do with computer graphics and computational geometry. He spent a long time study graduate-level algebraic geometry and algebraic topology while having the duty to be a professor at computer science department. His stories is always an inspiration for me to learn more.


Is is possible to use css selector to pick up content from html?


Unfortunately, no, but that's a reasonable request. The only ways to get data out of HTML right now are from a table or list.


The article is not true, Chinese president Xi Jingping's daughter goes to Harvard and many her high school class mates in China think she is just an average student.



Obligatory Schemes and Syzygies


Any one know how Sublime Text's Command Palette alternative in emacs?


not too sure if I understood, it's been a while since I used sublime text. meta-x is probably the most literal analog of the command pallet, but you might be asking about packages, in which case using meta-x to bring up the 'command input' and typing package-list-packages might be what you are looking for.



I use Smex + ido-vertical-mode which looks like this: http://klibert.pl/ido-vertical.png. It's closer to how the "command palette" looks like than the normal ido. It doesn't display keybindings next to commands like Sublime does, but if you have `suggest-key-bindings` set, Emacs will show you command binding when you execute it: http://klibert.pl/suggest-key-binding.png

Helm (https://github.com/emacs-helm/helm) is another way of doing this, although I don't use it (yet - I'm going to check it out sooner or later).

The "command palette" (M-x or <esc>: in Emacs/Vim respectively) is a very useful tool for both exploring and working with the editor. It's kind of sad that people forgot about it for a few decades and only rediscovered it recently thanks to Sublime and similar.


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