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arraysdictionaryswift3

How to substitute value in an array based on matched values in a dictionary?

I have an String array such as:

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

and I have a dictionary 

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

How do I iterate through the array to produce the array

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

  • This seriously looks like homework.... 

    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)