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Re:Server-Side Javascript: Back With a Vengeance by gaius on Friday December 18, 2009 @09:08AM (#1003108)
I sometimes wonder why Lua when Tcl already existed, but I've never used Lua.
Re:Server-Side Javascript: Back With a Vengeance by gruseom on Friday December 18, 2009 @03:39PM (#1003889)
This interview addresses that:

http://www.techworld.com.au/article/260022/-z_programming_la...

We needed an easy-to-use configuration language, and the only configuration language available at that time (1993) was Tcl. Our users did not consider Tcl an easy-to-use language. So we created our own configuration language.

Given how different Lua ended up, though, I imagine there was more to it than that.

Re:Server-Side Javascript: Back With a Vengeance by krakensden on Friday December 18, 2009 @03:56PM (#1003918)
Lua is much closer (not visually) to the C/Java family languages, which makes it more approachable.