console.log([].reduce(() => {}, undefined)); // should be undefinedTypescriptToLua Playground
TS Playground
This is the more correct code roblox-ts uses:
function TS.array_reduce(list, callback, ...)
local first = 1
local last = #list
local accumulator
-- support `nil` initialValues
if select("#", ...) == 0 then
if last == 0 then
error("Reduce of empty array with no initial value at Array.reduce", 2)
end
accumulator = list[first]
first = first + 1
else
accumulator = ...
end
for i = first, last do
accumulator = callback(accumulator, list[i], i - 1, list)
end
return accumulator
end
function TS.array_reduceRight(list, callback, ...)
local first = #list
local last = 1
local accumulator
-- support `nil` initialValues
if select("#", ...) == 0 then
if first == 0 then
error("Reduce of empty array with no initial value at Array.reduceRight", 2)
end
accumulator = list[first]
first = first - 1
else
accumulator = ...
end
for i = first, last, -1 do
accumulator = callback(accumulator, list[i], i - 1, list)
end
return accumulator
end
TypescriptToLua Playground
TS Playground
This is the more correct code roblox-ts uses: