我有一个烦人的脚本,我无法完成。
我需要32个非重复数字,可能是0-64数字集。每当我尝试创建一个循环来检查数组中所有数字的新随机数时,我最终都没有任何结果,或者是无限循环。
我很难过:(
答案 0 :(得分:3)
试试这个:
var keys = [], numbers = [], x, total = 0;
while(total < 32) {
x = Math.floor(Math.random() * 64);
// way faster that looping through the array to check if it exists
if(keys[x] == undefined) {
keys[x] = 1;
numbers.push(x);
total++;
}
}
console.log(numbers);
<强> Working Demo 强>
答案 1 :(得分:0)
此代码将生成介于0和您给出的任何数字之间的非重复随机数,并且当它被称为您给出的数字量时将重新开始。
试一试:
let randomNumber = function (max) {
let min = 0, prevIndexes = [];
function exec(max2) {
max = max || max2;
let result = Math.floor(Math.random() * (max - min + 1) + min);
if (prevIndexes) {
if (prevIndexes.length - 1 === max) {
clear();
}
let foundDouble, eqPrevInn = true;
while (eqPrevInn) {
foundDouble = false;
result = Math.floor(Math.random() * (max - min + 1) + min);
for (let i = 0, l = prevIndexes.length; i < l; i++) {
if (result === prevIndexes[i]) {
foundDouble = true;
break;
}
}
if (!foundDouble) {
eqPrevInn = false;
}
}
}
prevIndexes.push(result);
console.log(prevIndexes);
return result;
}
let clear = function () {
if (prevIndexes) {
prevIndexes = [];
// console.log('prevIndexes has been cleared');
}
else {
// console.log('already clear');
}
}
return {
exec: exec,
clear: clear
}
};
let random32 = randomNumber(32/*range*/).exec;
for (let i = 0; i <= 32; i++) {
random32();
}