小编Fox*_*Fox的帖子

我有一个包含很多多边形的地图,其中一个有一个点,如下所示:

多边形边缘的x和y坐标保存在这样的数据库中(例如):

Polygon(Point(11824, 10756), Point(11822, 10618), Point(11912, 10517), Point(12060, 10529), Point(12158, 10604), Point(12133, 10713), Point(12027, 10812), Point(11902, 10902)),
Polygon(Point(11077, 13610), Point(10949, 13642), Point(10828, 13584), Point(10772, 13480), Point(10756, 13353), Point(10849, 13256), Point(10976, 13224), Point(11103, 13294), Point(11171, 13414), Point(11135, 13558)),
Polygon(Point(11051.801757813, 11373.985351563), Point(11165.717773438, 11275.469726563), Point(11281.733398438, 11255.646484375), Point(11381.07421875, 11333.15625), Point(11440.202148438, 11467.706054688), Point(11404.73046875, 11584.534179688), Point(11301.662109375, 11643.852539063), Point(11169.486328125, 11644.079101563), Point(11067.555664063, 11579.676757813), Point(11018.21484375, 11454.750976563)),
Polygon(Point(12145, 13013), Point(12069.065429688, 13014.67578125), Point(12012.672851563, 12953.833984375), Point(11973.942382813, 12910.14453125), Point(11958.610351563, 12853.736328125), Point(11988.58203125, 12780.668945313), Point(12046.806640625, 12735.046875), Point(12117.080078125, 12729.838867188), Point(12185.567382813, 12743.389648438), Point(12225.575195313, 12803.530273438), Point(12255.934570313, 12859.2109375), …

在控制台应用程序中。我需要从主线程加载一些长时间运行的代码（网络内容、REST 调用）。我想将它传递给后台线程并且不阻塞调用线程。我将调用该方法中的事件来处理其结果。

这样做有什么区别吗？

public async Task MainThreadAsync() {
    _ = Task.Run(async () => await DoSomethingAsync());
    // Continue with other stuff and don't care about DoSomethingAsync()
}

private async Task DoSomethingAsync() {
    // Doing long running stuff
}

或这样做？

public async Task MainThreadAsync() {
    DoSomethingAsync();
    // Continue with other stuff and don't care about DoSomethingAsync()
}

private async void DoSomethingAsync() {
    // Doing long running stuff
}

VB.Net：

Public Async Function MainThreadAsync() As Task 
    Task.Run(Async Function() As Task
                 Await DoSomethingAsync()
             End …

当我用lua检查两个条件时,哪个方式的运行时间更快？

if bool and somefuntion() then
    do stuff
end

要么

if bool then
    if somefuntion() then
        do stuff
    end
end

？

我设置了一些这样的变量:

local var1Age = 10
local var2Age = 20
local var3Age = 30

现在我想用这样的循环迭代它们:

for i=1, 3 do
    if var..i..Age >= 21 then
        print("yep")
    end
end

我无法更改变量,也无法创建表格.这个变量有可能吗？

编辑: 我可以这样做:

if var1Age >= 21 then
    print("yep")
end
if var2Age >= 21 then
    print("yep")
end
if var3Age >= 21 then
    print("yep")
end

但我有~50个这样的变量.这就是我搜索循环方式的原因.

Edit2: vars是由我无法改变的类设置的,因此我无法改变vars的设置方式.例如,我不能像这样设置变量:

local varAge = {}
varAge[1] = 10
varAge[2] = 20
varAge[3] = 30

Edit3: 该类将vars保存在如下表格中:http://ideone.com/iO4I8N

我想设置表成员的索引,但仍然命名它们.那可能吗？

local table = {
    ["cat"] = {
        ["fish"] = { stuff = "bla1", stuff2 = "bla" },
        ["mouse"] = { stuff = "bla2", stuff2 = "bla" },
        ["bird"] = { stuff = "bla3", stuff2 = "bla" },
    },
    ["dog"] = {
        ["fish"] = { stuff = "bla1", stuff2 = "bla" },
        ["mouse"] = { stuff = "bla2", stuff2 = "bla" },
        ["bird"] = { stuff = "bla3", stuff2 = "bla" },
    },
}

table["cat"][1]是fish,但我想要的table["cat"][0]是 …

我正在开发一个“简单”基数转换器，用于将基数为 10 的 ULong 转换为任何基数的字符串。这里我使用64个字符。用例是缩短存储为字符串的 ULong。

Public Class BaseConverter
    'base64, but any length would work
    Private Shared ReadOnly Characters() As Char = {"0"c, "1"c, "2"c, "3"c, "4"c, "5"c, "6"c, "7"c, "8"c, "9"c,
                                                    "a"c, "b"c, "c"c, "d"c, "e"c, "f"c, "g"c, "h"c, "i"c, "j"c, "k"c, "l"c, "m"c, "n"c, "o"c, "p"c, "q"c, "r"c, "s"c, "t"c, "u"c, "v"c, "w"c, "x"c, "y"c, "z"c,
                                                    "A"c, "B"c, "C"c, "D"c, "E"c, "F"c, "G"c, "H"c, "I"c, "J"c, "K"c, "L"c, "M"c, "N"c, "O"c, "P"c, "Q"c, "R"c, "S"c, "T"c, "U"c, "V"c, …