How to convert Strings in Swift? - arrays

Question

I've two cases where I need to convert strings to different formats.
for ex:
case 1:
string inputs: abc, xyz, mno, & llr // All Strings from a dictionary
output: ["abc","xyz", "mno", "llr"] //I need to get the String array like this.
But when I use this code:
var stringBuilder:[String] = [];
for i in 0..<4 {
stringBuilder.append("abc"); //Appends all four Strings from a Dictionary
}
print(stringBuilder); //Output is 0: abc, 1:xyz like that, how to get desired format of that array like ["abc", "xyz"];
Real usage:
let arr = Array(stringReturn.values);
//print(arr) // Great, it prints ["abc","xyz"];
let context = JSContext()
context?.evaluateScript(stringBuilder)
let testFunction = context?.objectForKeyedSubscript("KK")
let result = testFunction?.call(withArguments:arr); // Here when I debugger enabled array is passed to call() like 0:"abc" 1:"xyz". where as it should be passed as above print.
Secondly how to replace escape chars in swift: I used "\" in replaceOccurances(of:"\\'" with:"'"); but its unchanged. why and how to escape that sequnce.
case 2:
string input: \'abc\'
output: 'abc'

Answer 1

To get all values of your dictionary as an array you can use the values property of the dictionary:
let dictionary: Dictionary<String, Any> = [
"key_a": "value_a",
"key_b": "value_b",
"key_c": "value_c",
"key_d": "value_d",
"key_e": 3
]
let values = Array(dictionary.values)
// values: ["value_a", "value_b", "value_c", "value_d", 3]
With filter you can ignore all values of your dictionary that are not of type String:
let stringValues = values.filter({ $0 is String }) as! [String]
// stringValues: ["value_a", "value_b", "value_c", "value_d"]
With map you can transform the values of stringValues and apply your replacingOccurrences function:
let adjustedValues = stringValues.map({ $0.replacingOccurrences(of: "value_", with: "") })
// adjustedValues: ["a", "b", "c", "d"]

Answer 2

Why not try something like this? For part 1 of the question that is:
var stringReturn: Dictionary = Dictionary<String,Any>()
stringReturn = ["0": "abc","1": "def","2": "ghi"]
print(stringReturn)
var stringBuilder = [String]()
for i in stringReturn {
stringBuilder.append(String(describing: i.value))
}
print(stringBuilder)
Also, part 2 seems to be trivial unless I'm not mistaken
var escaped: String = "\'abc\'"
print(escaped)

Answer 3

case 1:
I have Implemented this solutions, Hope this will solve your problem
let dict: [String: String] = ["0": "Abc", "1": "CDF", "2": "GHJ"]
var array: [String] = []
for (k, v) in dict.enumerated() {
print(k)
print(v.value)
array.append(v.value)
}
print(array)
case 2:
var str = "\'abc\'"
print(str.replacingOccurrences(of: "\'", with: ""))