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-- remove whitespace at the ends of a string.
function string:strip()
return self:match'^%s*(.*%S)' or ''
end
-- split a string by a separator
function string:split(sep)
local sep, fields = sep or "\t", {}
local pattern = string.format("[^%s]+", sep)
for tok in self:gmatch(pattern) do fields[#fields+1] = tok end
return fields
end
----------------------------------------------------
-- Testing Functions Don't copy these to Go code --
----------------------------------------------------
function test_strip()
a = " aaa "
assert(a:strip() == "aaa")
a = " aaa\t"
assert(a:strip() == "aaa")
a = " aaa "
assert(a:strip() == "aaa")
end
function test_split()
v = string.split("x xx x", "%s")
assert(#v == 3)
assert(v[1] == "x")
assert(v[2] == "xx")
v = string.split("x xx\tx", "%s")
assert(v[1] == "x")
assert(v[2] == "xx")
end
function test()
test_strip()
test_split()
end
test()
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