正则表达式 - LUA正则如何匹配多个段的数字？

Question

由于lua不能使用|、{}等匹配方式，请问gmatch如何能实现(1[1-5]|2[1-3]|3[1-7]|4[1-6]|5[0-4]|6[1-5]|8[1-3])这样的匹配规则？

Answer 1

local function match_numbers(input)
    local patterns = {
        "1[1-5]",
        "2[1-3]",
        "3[1-7]",
        "4[1-6]",
        "5[0-4]",
        "6[1-5]",
        "8[1-3]",
    }

    local result = {}
    for _, pattern in ipairs(patterns) do
        for number in input:gmatch(pattern) do
            table.insert(result, number)
        end
    end

    return result
end

local input = "11 12 21 31 41 50 61 83 84"
local numbers = match_numbers(input)

for _, number in ipairs(numbers) do
    print(number)
end