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add max_split to stringx.split

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Jeremy S. Postelnek 2021-12-24 13:03:36 -05:00 committed by GitHub
parent 2d5555400d
commit 660ae8ca52
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1 changed files with 9 additions and 2 deletions
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11
stringx.lua
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@ -11,10 +11,13 @@ local stringx = setmetatable({}, {
}) })
--split a string on a delimiter into an ordered table --split a string on a delimiter into an ordered table
function stringx.split(self, delim) function stringx.split(self, delim, max_split)
delim = delim or "" delim = delim or ""
max_split = max_split ~= nil and max_split or math.huge
assert:type(self, "string", "stringx.split - self", 1) assert:type(self, "string", "stringx.split - self", 1)
assert:type(delim, "string", "stringx.split - delim", 1) assert:type(delim, "string", "stringx.split - delim", 1)
assert:type(max_split, "number", "stringx.split - max_split", 1)
--we try to create as little garbage as possible! --we try to create as little garbage as possible!
--only one table to contain the result, plus the split strings. --only one table to contain the result, plus the split strings.
@ -46,7 +49,11 @@ function stringx.split(self, delim)
end end
end end
if has_whole_delim then if has_whole_delim then
table.insert(res, i) if #res < max_split then
table.insert(res, i)
else
break
end
end end
--iterate forward --iterate forward
i = i + delim_length i = i + delim_length