1

How can I optimise code using Swift functions like the filter? What I want to do is I need to find a particular key if present no matter what value of that key is in the below array?

Below method works fine for me but I think there is some better way to do it.

let arrDic = [["Key1": "yes"], ["Key2": "no"], ["Key3": "yes"], ["Key4": "Option1, Option2"], ["Key5": "OC1_OPTIONB"], ["Key6": "H1_OPTIONA"]]

for dict in arrDic {
    if dict["Key1"] != nil {
        print(true)
        break
    }
}
Hamish
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Parth Adroja
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2 Answers2

0
let arrDic = [["Key1": "yes"], ["Key2": "no"], ["Key3": "yes"], ["Key4": "Option1, Option2"], ["Key5": "OC1_OPTIONB"], ["Key6": "H1_OPTIONA"]]

let result = arrDic.filter { $0["Key1"] != nil }.first

I'm sorry, didn't notice an intentions, add then

print(result != nil)

or even shorter 

let isPresent = arrDic.filter { $0["Key1"] != nil }.isEmpty

or even 

let isPresent = arrDic.contains { $0["Key1"] != nil }
Vladyslav Zavalykhatko
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0

You can search for an item using custom matching with contains:

if arrDic.contains(where: {(dict) -> Bool in
    return dict["Key1"] != nil
}) {
    print(true)
}
Oskar
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