How to delete some words in string in Swift

Question

I'm working on swift. How to delete between 2 characters, for example from '[' to ']' and how to delete "glass" word from a string?

Answer 1

You might want to try using subStringWithRange

var str = "Hello, playground"
var startIndex = 0
var endIndex = 18
str.substringWithRange(Range<String.Index>(start: str.startIndex, end: str.endIndex)) //"Hello, playground"

Then, you could assign that to a variable and do the rest. If you need further assistance let me know. Credit goes here. You can also have a look there for support.

Hope that helps :)

Answer 2

Here is a function modified to allow multiple deletions. The first function handles a single deletion. The second function splits the sentence into different sentences one for each start-end group and then applies function 1 before concatenating to get the final result. I have not tested it exhaustively. the first function is protected for non-existent startString and/or endString.

Function deleteEnclosedString returns the string remaining after string enclosed within startString and endString (inclusive) is deleted.

    import UIKit
    import Foundation


    var str = "Hello, [play]ground [again]hi everybody [again]"


func deleteEnclosedString (s: String, s1:String, s2: String) -> String {
    var returnedString = s
    var x = s.componentsSeparatedByString(s1)
    if (x[0] != s){ // startString present
        let y = x[1].componentsSeparatedByString(s2)
        if  (y[0] != x[1]) { // start and endString present
            returnedString = x[0]+y[1]
        } else { // startString present, endString missing
            returnedString = x[0]
        }
    } else { // startString missing
        let y = s.componentsSeparatedByString(s2)
        if  (y[0] != s)  { // no startString, endString present
            returnedString = y[1]
        } else { // no startString, endString missing
            returnedString = y[0]
        }
    }
    //println("returnedString: "+returnedString)
    return returnedString

}

func deleteAllEnclosedStrings (s: String, startString s1:String, endString s2:String) -> String{

    var returnedString = ""
    var allSubstrings = s.componentsSeparatedByString(s1)
    var strCount = allSubstrings.count
    for i in (0 ..< strCount) {
        var y = deleteEnclosedString(allSubstrings[i], s1 , s2)
        returnedString = returnedString + y
    }
    return(returnedString)
}

// test cases
// start and end available
deleteAllEnclosedStrings(str, startString: "[", endString: "]") // Hello, ground hi everybody
// start but no end
deleteAllEnclosedStrings(str, startString: "[", endString: "}") // Hello, play]ground again]hi everybody again] and