javascript - 数组中的随机项没有使用 javascript 重复？

Question

如何从数组中获取不重复的随机项？

我有一个元素数组，比如

var a = ["Mango", "Orange", "Banana", "Apple", "Grapes", "Berry", "Peach"]

我想从数组 a 中获取 3 个随机项

var random = ["Banana", "Berry", "Peach"]

Answer 1

var a = ["Mango","Orange","Banana","Apple","Grapes","Berry","Peach"];

function searchRandom(count, arr){
  let answer = [], counter = 0;
 
  while(counter < count){
    let rand = arr[Math.floor(Math.random() * arr.length)];
    if(!answer.some(an => an === rand)){
      answer.push(rand);
      counter++;
    }
  }
  
  return answer;
}

console.log(searchRandom(3,a))

使其灵活地支持您想要的任何计数并确保唯一性