JavaScript的引用数据类型你了解多少

let obj = {
			uname : '阿飞',
			age : 22,
			sex : '男'
		}

// Object：创建普通对象的构造函数
let obj = new Object( {uname : '阿飞', age : 22, sex : '男'} );

let re = Object.keys(obj)

let re = Object.values(obj);

let arr = [1, 2, 3];

let ary = new Array(1, 2, 3);

		let arr = [1, 2, 3];
		let ary1 = ['a', 'b', 'c', 'd'];
		let ary2 = [11, 222, 333];
		let reArr = arr.concat(ary1, ary2, '张飞', '关羽', '赵云');
		console.log(reArr);

		let arr1 = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'];
		let str = arr1.join('');
		console.log(str);

		let arr3 = [1, 2, 3];
		let re = arr.reverse();
		console.log(re);

        let arr1 = ['a', 'b', 'c', 'd', 'a', 'b', 'f'];
		let re1 = arr1.indexOf('a');
		console.log(re1);

		let re2 = arr1.lastIndexOf('b');
		console.log(re2);

		let arr2 = [3, 16, 22, 66, 123, 99];

		// sort正序排列:
		let re3 = arr2.sort(function (a, b) {
			return a - b;
		});

		// sort倒序排列
		let arr2 = [3, 16, 22, 66, 123, 99];
		let re4 = arr2.sort(function (a, b) {
			return b - a;
		});

		let a = [1, 2, 3];
		let re = Array.isArray(a);
		console.log(re);

// 特别注意：要想把伪数组转换为真数组必须有length属性
		let o = {
			0 : 'a',
			1 : 'b',
			2 : 'c',
			3 : 'd',
			4 : 'e',
			5 : 'f',
			6 : 'h',
			length : 4,
		}

		let ary = Array.from(o);

		console.log( ary );

		let arr = [
					{uname :'阿飞', age : 22, sex : '男'},
					{uname :'张三丰', age : 23, sex : '男'},
					{uname :'李寻欢', age : 21, sex : '男'},
					{uname :'张三丰1', age : 23, sex : '男'},
					{uname :'李寻欢1', age : 21, sex : '男'},
					{uname :'张三丰2', age : 23, sex : '男'},
					{uname :'李寻欢2', age : 21, sex : '男'},
					{uname :'张三丰2', age : 23, sex : '男'},
					{uname :'李寻欢2', age : 21, sex : '男'},
				];
		arr.forEach( item => {
			console.log(`姓名:${item.uname},年龄${item.age},性别${item.sex}`);
		} );

		let re = [2, 6, 4, 7, 9, 3];
		let result = re.find(function (item, index, o) {
			return item > 5;
		})
		console.log(result);

		let result1 = re.findIndex(function (item, index, o) {
			return item > 40;
		});
		console.log(result1);

		let result2 = re.some(function (item, index, o) {
			return item > 5;
		})
		console.log(result2);

		let result3 = re.every(function (item, index, o) {
			return item > 5;
		});
		console.log(result3);

		let result4 = re.filter(function (item, index, o) {
			return item > 5;
		});
		console.log(result4);

		let result5 = re.map(function (item, index, o) {

			return item * item;

		});
		console.log(result5);

let reg = /abc/;

let reg1 = new RegExp(/abc/);