Check if a string exists in an array case insensitively

Question

Declaration:

let listArray = [\"kashif\"]
let word = \"kashif\"

then this

contains(listArray, word) 

Ret

Answer 1

Expanding on @Govind Kumawat's answer

The simple comparison for a searchString in a word is:

word.range(of: searchString, options: .caseInsensitive) != nil

As functions:

func containsCaseInsensitive(searchString: String, in string: String) -> Bool {
    return string.range(of: searchString, options: .caseInsensitive) != nil
}

func containsCaseInsensitive(searchString: String, in array: [String]) -> Bool {
    return array.contains {$0.range(of: searchString, options: .caseInsensitive) != nil}
}

func caseInsensitiveMatches(searchString: String, in array: [String]) -> [String] {
    return array.compactMap { string in
        return string.range(of: searchString, options: .caseInsensitive) != nil
            ? string
            : nil
    }
}