排序 – 在Lua中排序表[]

你可以做的是按顺序迭代表。基本的对不保证键的访问顺序。这是一个自定义版本的对，我称之为多余的，因为它以排序顺序遍历表：

function spairs(t,order)
    -- collect the keys
    local keys = {}
    for k in pairs(t) do keys[#keys+1] = k end

    -- if order function given,sort by it by passing the table and keys a,b,-- otherwise just sort the keys 
    if order then
        table.sort(keys,function(a,b) return order(t,a,b) end)
    else
        table.sort(keys)
    end

    -- return the iterator function
    local i = 0
    return function()
        i = i + 1
        if keys[i] then
            return keys[i],t[keys[i]]
        end
    end
end

以下是使用此功能的示例：

HighScore = { Robin = 8,Jon = 10,Max = 11 }

-- basic usage,just sort by the keys
for k,v in spairs(HighScore) do
    print(k,v)
end
--> Jon     10
--> Max     11
--> Robin   8

-- this uses an custom sorting function ordering by score descending
for k,v in spairs(HighScore,function(t,b) return t[b] < t[a] end) do
    print(k,v)
end
--> Max     11
--> Jon     10
--> Robin   8