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fix(vim.iter): use correct cmp function when truncating tail in take (#27998)

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Calvin Bochulak 2024-03-23 15:46:54 -06:00 committed by GitHub
parent 3d9c028a4c
commit ca6dbf3558
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2 changed files with 8 additions and 1 deletions
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3
runtime/lua/vim/iter.lua
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@ -709,7 +709,8 @@ end
---@private
function ListIter:take(n)
local inc = self._head < self._tail and 1 or -1
self._tail = math.min(self._tail, self._head + n * inc)
local cmp = self._head < self._tail and math.min or math.max
self._tail = cmp(self._tail, self._head + n * inc)
return self
end

6
test/functional/lua/iter_spec.lua
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@ -247,6 +247,12 @@ describe('vim.iter', function()
eq({ 4, 3, 2, 1 }, vim.iter(t):take(5):totable())
end
do
local t = { 4, 3, 2, 1 }
eq({ 1, 2, 3 }, vim.iter(t):rev():take(3):totable())
eq({ 2, 3, 4 }, vim.iter(t):take(3):rev():totable())
end
do
local t = { 4, 3, 2, 1 }
local it = vim.iter(t)