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Programming-Idioms

History of Idiom 119 > diff from v24 to v25

Edit summary for version 25 by Bug38:
New Lua implementation by user [Bug38]
↷

Version 24

2016-11-17, 16:36:24

Version 25

2017-08-21, 12:38:04

Idiom #119 Deduplicate list

Remove duplicates from list x.
Explain if original order is preserved.

Illustration

Idiom #119 Deduplicate list

Remove duplicates from list x.
Explain if original order is preserved.

Illustration
Extra Keywords
deduplicate dupe dupes redundant redundancy
Extra Keywords
deduplicate dupe dupes redundant redundancy
Code 
local test = {1,2,4,2,3,4,2,3,4,"A", "B", "A"}
local hash = {}
local res = {}

for _,v in ipairs(test) do
   if (not hash[v]) then
       res[#res+1] = v
       hash[v] = true
   end
end
Doc URL
https://stackoverflow.com/questions/20066835/lua-remove-duplicate-elements