js 根据指定个数切割数组

Part.1 问题

写项目时，遇到需要前端做 假分页 的问题：后端会将数据全部返回，前端自己做分页

Part.2 思路

拿到后端全部返回的数据后，按照 产品需求  进行分页，如每页显示 10 条数据为例，则需要将全部数据 按照每 10 条一个小数组进行分割，然后合并为一个大数组，然后根据索引取值

Part.3 例如

我们假设这是后端返回的全部数据

arr: [
               {name: \'小明\', age: 20},
               {name: \'小红\', age: 21},
               {name: \'小军\', age: 22},
               {name: \'小王\', age: 23},
               {name: \'小朱\', age: 24},
               {name: \'小刘\', age: 25},
               {name: \'小张\', age: 26},
               {name: \'小庞\', age: 27},
               {name: \'小米\', age: 28},
               {name: \'小华\', age: 29},
               {name: \'小郑\', age: 30},
               {name: \'小蓝\', age: 31},
               {name: \'小绿\', age: 32},
               {name: \'小青\', age: 33},
               {name: \'小白\', age: 34},
               {name: \'小黑\', age: 35},
               {name: \'小橙\', age: 36},
               {name: \'小紫\', age: 37},
               {name: \'小山\', age: 38},
               {name: \'小一\', age: 39},
               {name: \'小鹏\', age: 40},
               {name: \'小丛\', age: 41},
               {name: \'小鱼\', age: 42},
               {name: \'小李\', age: 43},
               {name: \'小英\', age: 44},
               {name: \'小杰\', age: 45},
               {name: \'小金\', age: 46},
               {name: \'小窗\', age: 47},
               {name: \'小叶\', age: 48},
               {name: \'小文\', age: 49},
               {name: \'小龙\', age: 50},
               {name: \'小纯\', age: 51},
               {name: \'小伟\', age: 52},
               {name: \'小佳\', age: 53},
               {name: \'小吴\', age: 54},
               {name: \'小枚\', age: 55},
               {name: \'小原\', age: 56},
               {name: \'小书\', age: 57},
               {name: \'小江\', age: 58},
               {name: \'小砚\', age: 59},
               {name: \'小然\', age: 60}
],

首先创建一个空数组，用于接收分割完成的小数组

 newArr: []

然后根据每页 10 条进行分割

 dataHandling: function() {
       let arrLength = this.arr.length; // 数组长度
       let num = 10;  // 每页显示 10 条
       let index = 0;
       for (let i = 0; i < arrLength; i++) {
            if (i % num === 0 && i !== 0) { // 可以被 10 整除
                 this.newArr.push(this.arr.slice(index, i));
                 index = i;
             };
             if ((i + 1) === arrLength) {
                  this.newArr.push(this.arr.slice(index, (i + 1)));
             }
       };
  }

结果如下：

将数据分割成了 5 个小数组，每个小数组为 10条 数据，然后根据分页操作取 大数组(newArr)的索引 就可以完成取值，实现假分页操作了！~~~