Tips for golfing in Lua

load

load is useful in many cases:

-- replace a repeated code segment:
load(("…"):gsub("…","…"))()

-- split a string:
s="1,2,3,4,5,6,7,8,9"
load("a={"..s.."}")()

Other tips

• If you need a function multiple times, assign it to a shorter variable
• Use ("").… instead of string.…
• Strings delimited by [[ and ]] can contain unescaped newlines
• Try to replace if with and/or