如何从数组中获取随机数量的项目？

Question

I'm using the code below to get a random number of items from an array, but I'd like to just get 3-5 random numbers from the provided range to display. Right now, it either shows 1, all, or any amount in between. I'm also good with completely changing up my strategy, so any and all advice is welcome. Much appreciated.

<script type="text/javascript" src="https://fiftyallstars.com/Code/jquery-2.2.4.js"></script>

<div>1</div>
<div>2</div>
<div>3</div>
<div>4</div>
<div>5</div>
<div>6</div>
<div>7</div>
<div>8</div>
<div>9</div>
<div>10</div>
<div>11</div>
<div>12</div>

<script type="text/javascript">
$('div').filter(function(){
    return (Math.round(Math.random()) == 1);
}).css({display: 'none'});
</script>

Answer 1

STEP 1: Shuffle the array

STEP 2: Randomly pick a number b/w 3 to 5.

STEP 3: From the beginning (or end) of the shuffled array pick random number of elements.

 const arr = ["apple", "mango", "banana", "grape", "orange", "guava", "melon", "watermelon"]; const shuffledArr = arr.sort(() => 0.5 - Math.random()); const getRandom = (arr, min, max) => { const numItemsToPick = Math.floor(Math.random() * (max-min+1)) + min return arr.slice(0, numItemsToPick) } const randomArr = getRandom(shuffledArr, 3,5) console.log(randomArr)

Answer 2

let ar = $('div'); //  get all the divs 
let start = Math.round(Math.random()*ar.length); // get random start 
let end = Math.round(Math.random()*ar.length); // get random end 

ar.splice(start,end).forEach(item=>{  // for getting random elements 
    item.style.display='none'
})