将值从一个数组移到另一个数组并删除它们 [英] Move values from one array to another and remove them

问题描述

我有20个数字数组.现在，我(随机)选择其中的5个，我想将它们放入另一个空数组中.我能怎么做?而且，当显示它们时，如何从第一个数组中隐藏它们?谢谢大家.

I have a 20 number array. Now I pick (randomly) 5 of these and i wanna put them into another empty array. How can I do? And also, how can I hide them from the first array when they're displayed? Thank you all.

var tenNumbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 20, 42, 178, 54, 76, 32, 12, 38, 154, 234];
var randomNumbers = document.getElementById("demo");
randomNumbers.innerHTML = tenNumbers[Math.floor(Math.random()*tenNumbers.length)];

推荐答案

似乎您应该可以使用

Seems like you should be able to use splice to remove a random element from the original array, then push that result onto a new array:

var tenNumbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 20, 42, 178, 54, 76, 32, 12, 38, 154, 234];
var outArray = [];
for(var i=0; i<5; i++) {
    outArray.push(tenNumbers.splice(Math.floor(Math.random()*tenNumbers.length), 1)[0]);
}
document.write(outArray + "<br />" + tenNumbers);

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