数组排序

1.纯数字数组

// 纯数字数组排序
let arr = [3, 4, 5, 1, 2]
            // 从小到大
            console.log(arr.sort());
            // 也是从小到大
            console.log(arr.sort((a, b) => a - b));
            // 从大到小
            console.log(arr.sort((a, b) => b - a));

 

2.数组对象属性排序

(1)对象的属性值是数字

例如，下面是根据age排序

let arr = [
            { name: 'zs', age: 12 },
            { name: 'ls', age: 6 },
            { name: 'ww', age: 24 },
        ];
        // 对象的数字属性排序
        // 从小到大
        let compare = (property) => (a, b) => a[property] - b[property]
        console.log(arr.sort(compare('age')));
        // 从大到小
        let compare2 = (property) => (a, b) => b[property] - a[property]
        console.log(arr.sort(compare2('age')));

 

（2）对象的属性值不是数字

①按英文字母a-z排序 或 z-a

 let data = [
                { name: 'Bob', score: '95', age: '18' },
                { name: 'Amy', score: '86', age: '18' },
                { name: 'Coco', score: '36', age: '18' },
                { name: 'Mark', score: '80', age: '18' },
                { name: 'Frank', score: '40', age: '18' }
            ];
          let newData = [...data]
          let newData2 = [...data]
        // a-z
        let compare =  property=>(a,b)=> a[property].charCodeAt(0)- b[property].charCodeAt(0)
        console.log(newData.sort(compare('name')));

        // z- a
        let compare2= property=>(a,b)=> b[property].charCodeAt(0)- a[property].charCodeAt(0)
        console.log(newData2.sort(compare2('name')));

②按拼音顺序排序 或 按拼音逆序排序

  let data = [
              {name: '张三',age:12},
              {name: '李四',age:23},
              {name: '王五',age:23},
              {name: '陈六',age:23},
          ]

          let newData = [...data]
          let newData2 = [...data]
        // 拼音a-z
          let compare = property=>(a,b)=> a[property].localeCompare(b[property],'zh')
       // 拼音z-a
       let compare2 = property=>(a,b)=> b[property].localeCompare(a[property],'zh')  
       console.log(newData.sort(compare('name')));
       console.log(newData2.sort(compare2('name')));