Convert Any dictionary array to String in Swift

Question

Convert [String:Any] dictionary array to [String:String] in Swift

I have an array of dictionary <String,Any> type. Now I want to convert to string because I want to show data in textField and text field not understand Any data type.

My data like this:

var myarr = [[String:Any]]()

[
    [
        "Area" : "",
        "Good" : "-",
        "Level" : 2,
        "Link" : "<null>",
        "Photo" : "-",
        "Repair" : "-",
        "Section" : "Others"
    ],

    [
        "Area" : "",
        "Good" : "N",
        "Level" : 2,
        "Link" : "http://google.com",
        "Photo" : 1,
        "Repair" : "Y",
        "Section" : "Grounds"
    ]

]

and I want new Array Dictionary:

var myarr = [[String:String]]()

You want to convert [[String:Any]] to [[String:String]] ? — Nirav D
– Nirav D, Commented May 2, 2017 at 5:06

John Dough · Accepted Answer · 2017-05-02 06:12:20Z

7

Map is your friend, maybe something like

let stringDictionaries: [[String: String]] = myarr.map { dictionary in
    var dict: [String: String] = [:]
    dictionary.forEach { (key, value) in dict[key] = "\(value)" }
    return dict
}

edited May 2, 2017 at 6:12

answered May 2, 2017 at 5:25

John Dough

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13 Comments

Harshil Kotecha Over a year ago

thank you it's work properly and not get any error in type converting

rmaddy Over a year ago

This answer is wrong. It adds an extra layer of arrays to the results.

Harshil Kotecha Over a year ago

please give another solution @rmaddy i am waiting for your solution

rmaddy Over a year ago

The update is wrong too. flatmap doesn't change anything here. Please verify your answer before posting. A simple test in the playground should be done.

rmaddy Over a year ago

Your test isn't valid. Test with a dictionary that has more than one key/value pair just like the data in the question.

|

rmaddy · Accepted Answer · 2017-05-02 14:01:17Z

Here is one solution that actually gives the correct results:

let myarr = [
    [
        "Area" : "",
        "Good" : "-",
        "Level" : 2,
        "Link" : "<null>",
        "Photo" : "-",
        "Repair" : "-",
        "Section" : "Others"
    ],

    [
        "Area" : "",
        "Good" : "N",
        "Level" : 2,
        "Link" : "http://someurl",
        "Photo" : 1,
        "Repair" : "Y",
        "Section" : "Grounds"
    ]
]


var newarr = [[String:String]]()
for dict in myarr {
    var newdict = [String:String]()
    for (key, value) in dict {
        newdict[key] = "\(value)"
    }
    newarr.append(newdict)
}
print(newarr)

Output:

[["Level": "2", "Area": "", "Good": "-", "Link": "<null>", "Repair": "-", "Photo": "-", "Section": "Others"], ["Level": "2", "Area": "", "Good": "N", "Link": "http://someurl", "Repair": "Y", "Photo": "1", "Section": "Grounds"]]

Nasser Munshi · Accepted Answer · 2017-05-02 06:23:20Z

1

You can create new dictionary using following code:

var newArray:[[String: String]] = []
for data in myarr {
    var dict: [String: String] = [:]
    for (key, value) in data {
        let strData = String(describing: value)
        dict[key] = strData
    }
    newArray.append(dict)
}

edited May 2, 2017 at 6:23

answered May 2, 2017 at 5:18

Nasser Munshi

1147 bronze badges

2 Comments

rmaddy Over a year ago

This code produces the wrong result. It only works if each dictionary has one key/value pair.

Nasser Munshi Over a year ago

I've edited my code. So now you can check the output.

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