如何基於字典中的匹配值來替換數組中的值？

-1

var depatureDay: [String] = ["2", "4", "1", "5"]

，我有一本字典

var dayDictionary: [String: String] = [ 
     "1": "Monday", 
     "2": "Tuesday", 
     "3": "Wednesday", 
     "4": "Thursday", 
     "5": "Friday", 
     "6": "Saturday", 
     "7": "Sunday"]

如何通過數組迭代產生陣列

["Tuesday", "Thursday", "Monday", "Friday"]

來源

2017-05-19 ruffdrum

正在做作業嗎？大聲笑，爲什麼不循環出發數組，獲取每個值，並將其用作字典的「關鍵字」，以提取日期名稱，您將放入新數組中。 – Pochi

我試過的循環沒有產生結果。你能舉一個你的意思嗎？ – ruffdrum

@ruffdrum難道你不認爲它只是單行代碼'let resultArray = depatureDay.flatMap {dayDictionary [$ 0]}' –

這嚴重看起來像家庭作業....

var depatureDay: [String] = ["2", "4", "1", "5"] 


var dayDictionary: [String: String] = [ 
    "1": "Monday", 
    "2": "Tuesday", 
    "3": "Wednesday", 
    "4": "Thursday", 
    "5": "Friday", 
    "6": "Saturday", 
    "7": "Sunday"] 


var resultArray = [String]() 

for dayKey in depatureDay { 

    guard let foundDate = dayDictionary[dayKey] else { 
     continue 
    } 

    resultArray.append(foundDate) 
} 

print(resultArray)

來源

2017-05-19 08:04:41 Pochi

完美。這是一個更大問題的一部分，我試圖將其分解爲儘可能簡單。謝謝你的幫助。 – ruffdrum

如何基於字典中的匹配值來替換數組中的值？

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