ES6中扩展运算符...与Set结合使用

 <!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
      //数组和set集合转换
      let set1 = new Set([1, 2, 3, 4,3, 4, 5]);
      console.log(set1);
 
      //字符串转集合
      let str1 = "1,2,3,4,5,6,7,8,9,10";
      let set2 = new Set(str1.split(","));
      console.log(set2);
 
      //集合转数组
      let arr1 = [...set1];
      console.log(arr1);
 
        //数组去重
      let arr2 = [1, 2, 3, 4,3, 4, 5];
      let rel=[...new set(arr2)];
      console.log(rel);
 
       //求并集
      let arr3 = [1, 2, 3];
      let arr4 = [4, 5, 6];
      let union = [...new Set([...arr3,...arr4])];
      console.log(union);
 
      //求交集
      let arr5 = [1, 2, 3];
      let arr6 = [2, 3, 4];
      let inter = [...new Set([...arr5].filter(x => arr6.includes(x)))];
      console.log(inter);
 
      //求差集
      let arr7 = [1, 2, 3];
      let arr8 = [2, 3, 4];
      let diff = [...new Set([...arr7].filter(x => !arr8.includes(x)))];
      console.log(diff);
    </script>
</body>
</html>

posted @ 2024-10-05 16:42 一个人走在路上阅读(5) 评论(0) 编辑收藏举报

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ES6中扩展运算符...与Set结合使用

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	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Document</title>
	</head>
	<body>
	<script>
	//数组和set集合转换
	let set1 = new Set([1, 2, 3, 4,3, 4, 5]);
	console.log(set1);

	//字符串转集合
	let str1 = "1,2,3,4,5,6,7,8,9,10";
	let set2 = new Set(str1.split(","));
	console.log(set2);

	//集合转数组
	let arr1 = [...set1];
	console.log(arr1);

	//数组去重
	let arr2 = [1, 2, 3, 4,3, 4, 5];
	let rel=[...new set(arr2)];
	console.log(rel);

	//求并集
	let arr3 = [1, 2, 3];
	let arr4 = [4, 5, 6];
	let union = [...new Set([...arr3,...arr4])];
	console.log(union);

	//求交集
	let arr5 = [1, 2, 3];
	let arr6 = [2, 3, 4];
	let inter = [...new Set([...arr5].filter(x => arr6.includes(x)))];
	console.log(inter);

	//求差集
	let arr7 = [1, 2, 3];
	let arr8 = [2, 3, 4];
	let diff = [...new Set([...arr7].filter(x => !arr8.includes(x)))];
	console.log(diff);
	</script>
	</body>
	</html>