Lua 多维表创建答案

【问题标题】：Lua Multidimensional Table CreateLua 多维表创建
【发布时间】：2011-08-07 03:55:24
【问题描述】：

我在 Lua 中有一个多维表，但我似乎无法创建它以便在 Lua 中使用？

表格

items ::= {

        {["category"]="tools", ["name"]="hammer", ["price"]=10,  ["quantity"]=5 },
        {["category"]="tools", ["name"]="saw", ["price"]=15,  ["quantity"]=4 },
        {["category"]="tools", ["name"]="screwdriver", ["price"]=4,  ["quantity"]=12 },
        {["category"]="tools", ["name"]="measuring tape", ["price"]=9,  ["quantity"]=3 },
        {["category"]="tools", ["name"]="pliers", ["price"]=10,  ["quantity"]=5 },
        {["category"]="tools", ["name"]="wrench", ["price"]=10,  ["quantity"]=5 },


        {["category"]="fasteners", ["name"]="nails", ["price"]=.1,  ["quantity"]=1500 },
        {["category"]="fasteners", ["name"]="screws", ["price"]=.2,  ["quantity"]=1200 },
        {["category"]="fasteners", ["name"]="staples", ["price"]=.05,  ["quantity"]=2000 },

}

错误：'<name>' expect near ':'

【问题讨论】：

标签： arrays lua lua-table

【解决方案1】：

::= 有点奇怪。看起来你在做 ASN.1 而不是 Lua。

试试这个：

items = {

        {["category"]="tools", ["name"]="hammer", ["price"]=10,  ["quantity"]=5 },
        {["category"]="tools", ["name"]="saw", ["price"]=15,  ["quantity"]=4 },
        {["category"]="tools", ["name"]="screwdriver", ["price"]=4,  ["quantity"]=12 },
        {["category"]="tools", ["name"]="measuring tape", ["price"]=9,  ["quantity"]=3 },
        {["category"]="tools", ["name"]="pliers", ["price"]=10,  ["quantity"]=5 },
        {["category"]="tools", ["name"]="wrench", ["price"]=10,  ["quantity"]=5 },


        {["category"]="fasteners", ["name"]="nails", ["price"]=.1,  ["quantity"]=1500 },
        {["category"]="fasteners", ["name"]="screws", ["price"]=.2,  ["quantity"]=1200 },
        {["category"]="fasteners", ["name"]="staples", ["price"]=.05,  ["quantity"]=2000 },

}

当我使用它时，我会在 Lua shell 中得到以下信息：

for k,v in pairs(items) do for k1,v1 in pairs(v) do print(k1,v1) end end
price   10
quantity    5
name    hammer
category    tools
price   15
quantity    4
name    saw
category    tools
price   4
quantity    12
name    screwdriver
category    tools
price   9
quantity    3
name    measuring tape
c    ategory    tools
price   10
quantity    5
name    pliers
category    tools
price   10
quantity    5
name    wrench
category    tools
price   0.1
quantity    1500
name    nails
category    fasteners
price   0.2
quantity    1200
name    screws
category    fasteners
price   0.05
quantity    2000
name    staples
category    fasteners

【讨论】：

【解决方案2】：

这是创建表格的一种方法。

function create_table()
    local l={} -- Initialize table.
    l[0]=[[]] -- Clear nil @ index 0.
    return l
end
t=create_table()
print(t) -- Prints table which is stored in memory.
--[[
    If you don't want to create everyday tables, you can use this matrix.
]]--
m={{["id"]=1},{["id"]=2,["name"]="Mr. Anon",["leet"]=1337}}
print(m[1]["id"]..", "..m[2]["id"]..", "..m[2]["name"]..", "..m[2]["leet"]..".")


# Table creation #
## Introduction ##
### How to guide ###

【讨论】：