When comparing Light Table vs Femto Emacs, the Slant community recommends Light Table for most people. In the question“What are the best open source programming text editors?” Light Table is ranked 19th while Femto Emacs is ranked 25th. The most important reason people chose Light Table is:
With LT's inline evaluation, you don't have to re-compile your whole source file. Each time you want to see an output, all you have to do is hover your cursor over the line you'd like to evaluate and press `ctrl+enter`; LT will evaluate that line of code for you.
Ranked in these QuestionsQuestion Ranking
Pro Inline evaluation
With LT's inline evaluation, you don't have to re-compile your whole source file. Each time you want to see an output, all you have to do is hover your cursor over the line you'd like to evaluate and press
ctrl+enter; LT will evaluate that line of code for you.
Pro Your code runs live as you write it
The "Watches" feature lets you see your code running live as you type it. This means that you can debug your code live while writing it, which leads to considerably less programming errors.
Pro Plugin manager available
LT has a plugin manager built directly inside of it. This plugin manager connects to LT's own registry of plugins, so whenever you want assistance while writing your HTML, JS, or even Python, just open up the plugin manager, search for it, and click the little install button beside it's name. Your plugin will then be installed.
Pro Well documented
A long and well written tutorial teaches how to program in femtolisp and write extensions for Femto Emacs.
Pro Highly compatible with Emacs
If you know Emacs, you can start using Femto Emacs immediately.
Pro Very small footprint
The size of the executable file and the femtolisp library add up to only 500 k. The C source code is also small and well documented, so one can easily modify it. You can also use the source code to learn how to program a text editor.
Pro Very fast startup time
For small files, Femto Emacs starts up faster than emacs or vim.
Con No syntax coloring for Latex
The distribution comes with syntax coloring examples for many languages, like Haskell, C, Lisp, Python, etc. However, there is no scheme for Latex. If you need syntax coloring for Latex, you will need to add your own color scheme.
Con Source distribution only
Femto Emacs is distributed only in source form. Therefore, you need to install ncurses, gcc and compile it with make and make install. There is no binary distribution. If you want mouse support, you need to program it in femtolisp or in C. This should not be a problem if you are a programmer, but can become an issue if you don't know Lisp or C. If you want to use femtolisp on Windows, you will need mingw and ncurses.