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fixed bug in filter_inplace for single element collections

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This commit is contained in:
Max Cahill 2021-07-06 14:33:41 +10:00
parent 0691f2bd36
commit 292345b953
1 changed files with 2 additions and 2 deletions
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4
functional.lua
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@ -99,13 +99,13 @@ end
--filters a sequence in place, modifying it --filters a sequence in place, modifying it
function functional.filter_inplace(t, f) function functional.filter_inplace(t, f)
local write_i = 1 local write_i = 0
local n = #t --cache, so splitting the sequence doesn't stop iteration local n = #t --cache, so splitting the sequence doesn't stop iteration
for i = 1, n do for i = 1, n do
local v = t[i] local v = t[i]
if f(v, i) then if f(v, i) then
t[write_i] = v
write_i = write_i + 1 write_i = write_i + 1
t[write_i] = v
end end
if i ~= write_i then if i ~= write_i then
t[i] = nil t[i] = nil