Javascript 初始化大型2D数组的最简洁方法
你可能在笑。我正在为我正在制作的基于Socket.IO的RPG创建一个大型地图。这是愚蠢的吗?我知道我可以用5行代码创建二维数组,但我需要数组中有不同的数字。例如,0=允许步行到,1=不允许步行到。想象一下这些数字变化很大,0、1等等 如果有更好的办法,请告诉我。也许是一种读取文本文件或其他东西的方法Javascript 初始化大型2D数组的最简洁方法,javascript,arrays,Javascript,Arrays,你可能在笑。我正在为我正在制作的基于Socket.IO的RPG创建一个大型地图。这是愚蠢的吗?我知道我可以用5行代码创建二维数组,但我需要数组中有不同的数字。例如,0=允许步行到,1=不允许步行到。想象一下这些数字变化很大,0、1等等 如果有更好的办法,请告诉我。也许是一种读取文本文件或其他东西的方法 var map = [ [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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];
如果它只包含零,那么是的,它可以用更简洁的方式创建。但是如果你要存储数据,你就要存储数据。阵列可以很好地用于此目的。随着地图越来越大,您可以使用更聪明的技巧来存储地图(例如,将地图数据编码为png图像或其他任何形式)。您可以初始化
m x n
空矩阵,然后只存储1
s的坐标:
var ones = [[2,3], [5, 12], ...];
for(i=0;i<ones.length;i++)
matrix[ones[i][0]][ones[i][1]] = 1;
var one=[[2,3],[5,12],…];
对于(i=0;iAs),这不能更接近“位图”的定义。因此,您可能希望将其存储为图像并检索像素,但是
考虑到浏览器解析javascript数组并将其转换为内存中的快速表示。如果您正在编写浏览器游戏,那么读取位图可能比将其作为实际数组(很好地缩小为游戏的核心)要慢
在这种情况下,您可能需要做的是:
制作一个1位位图(我认为甚至MSPaint也可以制作)。另存为位图
编写读取此位图所有像素的代码(位图格式非常简单)
将包含位图中像素值的有效javascript数组输出到存储库中的某个文件中
在您的构建过程中将这一点连接在一起,以便最终缩小的代码将位图作为数组包含在其中
位图可能有些混乱。相反,只制作一个包含0和1的文本文件,并通过AJAX检索它:
0000000010111111101010110110011
1111010011100101100101010101000
0001010101010101101001010101010
etc...
js:
您可以在换行符上拆分以获得字符串数组,然后拆分每个字符串以获得“字符”数组
您将得到一个由单个字符串组成的数组,因此您可能希望迭代数组并将其全部转换为数字,但根据代码的其余部分,这可能不是必需的。使数据更具可读性的一种方法是将其编码为字符串并动态“解析”:
var map = ("\
----------------------------------1--------------- \
-------------------------------------------------- \
---1---------------------------------------------- \
-------------------------------------------------- \
-------------------------------------------------- \
-------------------------------------------------- \
-------------------------------------------------- \
⋮
-------------------------------------------------- \
--------------------------------------------------"
.split(' ')
.map(function(row) {
return row.split('')
.map(function(cell) {
return {'-':0, '1':1}[cell];
});
}));
你也应该考虑使用这种稀疏数据的可能性。
哈哈哈!认真地说,请稍微有点建设性。请:PIT是一个有效的位图。用一个图像来看看这个问题:这个问题需要改进;这是一个简单的概念的任意大例子:请花些时间来提出问题。关于更简明和更广泛的适用性;从标题开始。@NathanielFord Ok,尽管我收到的答案正是我所问的:P@jskidd3这很好!但我们也有兴趣帮助未来的答案寻求者。而且没有理由拥有50x50(或任何型号)我喜欢写数组,因为我认为它是最快的选择。我不喜欢我发布的方法的唯一原因是因为它很长,你的解决方案完美地解决了这个问题!8-)我很感兴趣为什么,现在似乎已经消失了。我确实喜欢这种方法,但我觉得moonwave99的答案最适合我的情况。:)在一般情况下,我推荐我的,但是如果你的1是稀疏的(比如你的例子),moonwave绝对是最好的。
var map = ("\
----------------------------------1--------------- \
-------------------------------------------------- \
---1---------------------------------------------- \
-------------------------------------------------- \
-------------------------------------------------- \
-------------------------------------------------- \
-------------------------------------------------- \
⋮
-------------------------------------------------- \
--------------------------------------------------"
.split(' ')
.map(function(row) {
return row.split('')
.map(function(cell) {
return {'-':0, '1':1}[cell];
});
}));