在JS中改组多维数组 [英] Shuffling multidimensional array in js
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问题描述
此函数仅对matrix [y]进行洗牌,但是我希望它对Matrix [y] [x]进行洗牌,但是它并不想正确地对洗牌。
This function shuffles only matrix[y], but I want it to shuffle matrix[y][x] But it doesn't want to shuffle correctly.
我使用的代码是:
function Shuffle(arguments) {
for (var k = 0; k < arguments.length; k++) {
var i = arguments[k].length;
if (i == 0)
return false;
else {
while (--i) {
var j = Math.floor(Math.random() * (i + 1));
var tempi = arguments[k][i];
var tempj = arguments[k][j];
arguments[k][i] = tempj;
arguments[k][j] = tempi;
}
return arguments;
}
}
return arguments
}
var matrix = [
];
var ab = 36;
for (var y = 0; y < ab; y++) {
matrix.push([])
for (var x = 0; x < ab; x++) {
matrix[y][x] = Math.floor(Math.random() * 1)
}
for (var x = 0; x < ab / 2; x++) {
matrix[y][x] = 1
}
}
arr = Shuffle(matrix);
console.log(arr)
var side = 16;
function setup() {
createCanvas(arr[0].length * side, arr.length * side);
background('#acacac');
frameRate()
}
function draw() {
for (var y = 0; y < arr.length; y++) {
for (var x = 0; x < arr[y].length; x++) {
if (matrix[y][x] == 0) {
fill(0, 255, 0)
rect(y * side, x * side, side, side)
} else if (matrix[y][x] == 1) {
fill("red")
rect(y * side, x * side, side, side)
} else if (matrix[y][x] == 2) {
fill(255, 255, 0)
rect(y * side, x * side, side, side)
} else if (matrix[y][x] == 3) {
fill(255, 0, 0)
rect(y * side, x * side, side, side)
}
}
}
}
因此,此函数仅对matrix [y]进行洗牌,但是我希望对sh [matrix [y] [x]进行洗牌。
有什么想法吗?这是屏幕截图:
So this function shuffles only matrix[y], but I want it to shuffle matrix[y][x]. Any ideas? Here is the screenshot:
推荐答案
如注释中所述,您在while循环之后有一个return语句,导致forloop从未按预期完成
As mentioned in comment, you had a return statement after the whileloop, causing the forloop to never finish as expected
function Shuffle(arguments) {
for (var k = 0; k < arguments.length; k++) {
var i = arguments[k].length;
if (i == 0)
return false;
else {
while (--i) {
var j = Math.floor(Math.random() * (i + 1));
var tempi = arguments[k][i];
var tempj = arguments[k][j];
arguments[k][i] = tempj;
arguments[k][j] = tempi;
}
return arguments; // remove this line
}
}
return arguments
}
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