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added tablex.random_index

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This commit is contained in:
Max Cahill 2021-07-06 08:29:45 +10:00
parent 20aa83f79e
commit 0691f2bd36
1 changed files with 10 additions and 2 deletions
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12
tablex.lua
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@ -161,12 +161,20 @@ local function _random(min, max, r)
or _global_random(min, max) or _global_random(min, max)
end end
--pick a random value from a table (or nil if it's empty)
function tablex.random_index(t, r)
if #t == 0 then
return 0
end
return _random(1, #t, r)
end
--pick a random value from a table (or nil if it's empty) --pick a random value from a table (or nil if it's empty)
function tablex.pick_random(t, r) function tablex.pick_random(t, r)
if #t == 0 then if #t == 0 then
return nil return nil
end end
return t[_random(1, #t, r)] return t[tablex.random_index(t, r)]
end end
--take a random value from a table (or nil if it's empty) --take a random value from a table (or nil if it's empty)
@ -174,7 +182,7 @@ function tablex.take_random(t, r)
if #t == 0 then if #t == 0 then
return nil return nil
end end
return table.remove(t, _random(1, #t, r)) return table.remove(t, tablex.random_index(t, r))
end end
--shuffle the order of a table --shuffle the order of a table