ios - 如何去除过滤后的数组中的重复项？

Question

我正在尝试获取一周的数组，但取而代之的是月份而不是日期或日期，因此包括今天在内的一周将是 ["Feb", "Feb", "Mar", "Mar", "Mar", "Mar", "Mar"]，但我只希望数组在发生变化时显示，所以我希望它像 ["Feb","", "三月", "", "", "", ""]

var month = [String]()//this includes the months for the whole week
var filterdmonth = ["", "", "", "", "", "", ""]
for(var s = 0; s < month.count; s++){
    if(month[s] != filterdmonth[0]){
        filterdmonth[s] = month[s]
        print(filterdmonth)
    }

}

这会打印出 ["Feb", "", "Mar","Mar","Mar","Mar","Mar",]

Answer 1

我不确定您输入的是什么，但是如果 month 是 ["Feb", "Feb", "Mar", "Mar", "Mar", "Mar ", "Mar"]，然后这是我开始工作的一些简单的东西。

let months = ["Feb", "Feb", "Mar", "Mar", "Mar", "Mar", "Mar"]
var workingMonth = ""

let filteredMonths = months.map { month -> String in
    let result = month != workingMonth ? month : ""

    if month != workingMonth {
        workingMonth = month // There is a new month, so update the working month.
    }

    return result
}

print(filteredMonths)