/usr/share/texlive/texmf-dist/tex/luatex/lualibs/lualibs-set.lua is in texlive-luatex 2012.20120611-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 | if not modules then modules = { } end modules ['l-set'] = {
version = 1.001,
comment = "companion to luat-lib.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
set = set or { }
local nums = { }
local tabs = { }
local concat = table.concat
local next, type = next, type
set.create = table.tohash
function set.tonumber(t)
if next(t) then
local s = ""
-- we could save mem by sorting, but it slows down
for k, v in next, t do
if v then
-- why bother about the leading space
s = s .. " " .. k
end
end
local n = nums[s]
if not n then
n = #tabs + 1
tabs[n] = t
nums[s] = n
end
return n
else
return 0
end
end
function set.totable(n)
if n == 0 then
return { }
else
return tabs[n] or { }
end
end
function set.tolist(n)
if n == 0 or not tabs[n] then
return ""
else
local t = { }
for k, v in next, tabs[n] do
if v then
t[#t+1] = k
end
end
return concat(t," ")
end
end
function set.contains(n,s)
if type(n) == "table" then
return n[s]
elseif n == 0 then
return false
else
local t = tabs[n]
return t and t[s]
end
end
--~ local c = set.create{'aap','noot','mies'}
--~ local s = set.tonumber(c)
--~ local t = set.totable(s)
--~ print(t['aap'])
--~ local c = set.create{'zus','wim','jet'}
--~ local s = set.tonumber(c)
--~ local t = set.totable(s)
--~ print(t['aap'])
--~ print(t['jet'])
--~ print(set.contains(t,'jet'))
--~ print(set.contains(t,'aap'))
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