查看专栏目录: VUE ------ element UI

专栏目标

在vue和element UI联合技术栈的操控下，本专栏提供行之有效的源代码示例和信息点介绍，做到灵活运用。

（1）提供vue2的一些基本操作：安装、引用，模板使用，computed，watch，生命周期(beforeCreate，created,beforeMount，mounted, beforeUpdate，updated, beforeDestroy，destroyed，activated，deactivated，errorCaptured，components，)、 $root , $parent , $children , $slots , $refs , props, $emit , eventbus ,provide / inject, Vue.observable, $listeners, $attrs, $nextTick , v-for, v-if, v-else,v-else-if，v-on，v-pre，v-cloak，v-once，v-model， v-html, v-text, keep-alive，slot-scope， filters, v-bind，.stop, .native, directives，mixin，render，国际化，Vue Router等

（2）提供element UI的经典操作：安装，引用，国际化，el-row，el-col，el-button，el-link，el-radio，el-checkbox ，el-input，el-select, el-cascader, el-input-number, el-switch,el-slider, el-time-picker, el-date-picker, el-upload, el-rate, el-color-picker, el-transfer, el-form, el-table, el-tree, el-pagination,el-badge,el-avatar,el-skeleton, el-empty, el-descriptions, el-result, el-statistic, el-alert, v-loading, $message, $alert, $prompt, $confirm , $notify, el-breadcrumb, el-page-header,el-tabs ,el-dropdown,el-steps,el-dialog, el-tooltip, el-popover, el-popconfirm, el-card, el-carousel, el-collapse, el-timeline, el-divider, el-calendar, el-image, el-backtop，v-infinite-scroll， el-drawer等

示例背景

在做vue项目时候，有的需求是将一维的对象数组转换成二维的对象数组，怎么操作呢？ 在本示例中，按照时间的划分，将一维对象数组转化为二维对象数组。第一维度的内容是时间，第二纬度的内容是一维数组中的某一项。

示例效果图

示例源代码

/*
* @Author: 大剑师兰特（xiaozhuanlan），还是大剑师兰特（CSDN）
* @此源代码版权归大剑师兰特所有，可供学习或商业项目中借鉴，未经授权，不得重复地发表到博客、论坛，问答，git等公共空间或网站中。
* @Email: 2909222303@qq.com
* @weixin: gis-dajianshi
* @First published in CSDN
* @First published time: 2024-01-12
*/<template><div class="djs-box"><div class="topBox"><h3>vue项目中 将一维对象数组转换为二维对象数组 </h3><div>大剑师兰特, 还是大剑师兰特，gis-dajianshi</div><h4><el-button @click="go()" type="primary" size="mini"> 转换数据</el-button></h4></div><div class="dajianshi"><div class="left"><h4>变换后的一维数组</h4><p v-for="(item,index) in arr1" :key="index"> 时间：{{item.time}}- 年份：{{item.year}}- 原索引：{{item.indexId}}</p></div><div class="right"><h4>变成二维数组</h4><div v-for="(item1,index1) in arr2" :key="index1"> ● 时间：{{item1.time}}<div v-for="(item2,index2) in item1.children" :key="index2" class="lh30">&nbsp;&nbsp;&nbsp;&nbsp; 内容：{{item2.info}}-代号-{{item2.code}} -- 原索引：{{item2.indexId}}-时间：{{item2.time}}</div></div></div></div></div>
</template><script>export default {data() {return {arr: [{'time': '2023-12-07','code': 'S10','gname': 'G10','info': '大剑师1'},{'time': '2023-12-07','code': 'S10','gname': 'G10','info': '大剑师2'},{'time': '2023-12-07','code': 'S11','gname': 'G11','info': '大剑师3'},{'time': '2023-12-08','code': 'S10','gname': 'G10','info': '大剑师4'},{'time': '2023-12-08','code': 'S11','gname': 'G11','info': '大剑师5'},{'time': '2023-12-09','code': 'S12','gname': 'G12','info': '大剑师6'}],arr1: [],arr2: [],}},mounted() {this.arr1 = this.dajianshi_arr1to1(this.arr)},methods: {go() {this.arr2 = this.dajianshi_arr1to2(this.arr1)console.log(this.arr2)},dajianshi_arr1to1(arr) {let newArr = arr.map((item, index) => {return {...item,indexId: index,year: item.time.substr(0, 4),}})return newArr;},dajianshi_arr1to2(arr) {let keys = Object.keys(arr[0])let level1 = 'time' //获取一级属性名称let list = Array.from(new Set(arr.map(item => {return item[level1]})))let subList = []list.forEach(res => {arr.forEach(ele => {if (ele[level1] === res) {let nameArr = subList.map(item => item.time)if (nameArr.indexOf(res) !== -1) {subList[nameArr.indexOf(res)].children.push({...ele})} else {subList.push({time: res,// label: res,children: [{...ele										}]})}}})})return subList}}}
</script>
<style scoped>.djs-box {width: 1000px;height: 680px;margin: 50px auto;border: 1px solid peru;}.topBox {margin: 0 auto 0px;padding: 10px 0 20px;background: peru;color: #fff;}.dajianshi {width: 98%;height: 480px;margin: 5px auto 0;}.lh30{ line-height: 30px;}.left {width: 50%;height: 100%;float: left;overflow-y: auto;background: #fed;}.right {width: 50%;height: 100%;float: left;overflow-y: auto;background: #edc;text-align: left;padding-left: 15px;box-sizing: border-box;}
</style>