一个有重复数据的数组,准备一个空数组,遍历有重复数据的数组同时用indexOf对比那个空数组判断是否有一样的,不一样的push进去空数组
let arr = dataInfo.map(item => item.warehouse);const newArr = [];arr.map(item1 => { if(newArr.indexOf(item1) == -1) { newArr.push(item1); }})
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