两个数组根据指定字段去重

佚名 6年前 (2019-05-14) 随笔 970人围观抢沙发百度已收录

const disDuplicate = (oldList, newList, field) => {
    let list = [],
        tempObj = {},
        allList = []
    allList = allList.concat(oldList, newList)
    for (let i = 0, len = allList.length; i < len; i++) {
        let item = allList[i]
        // 判断是否已有相同字段的值
        if (!tempObj[item[field]]) {
            list.push(item)
            tempObj[item[field]] = 1
        } else {
            // 替换已有相同字段的数据，取最新值
            for (let j = 0, jlen = list.length; j < jlen; j++) {
                if (list[j][field] == item[field]) {
                    list[j] = item
                    break
                }
            }
        }
    }
    return list
}