How can we split a string according to a specific range and put the sliced items in arrays like the example below:
let sentence = "Str1 {M} Str2 {/M} Str3 {M} Str4 {/M} {M} Str5 {/M} Str6 {M} Str7 {/M}"
Note: Str1 , Str2 ... are a strings
What I want: (1,2,3 and 4)
1) OutputBetweenM = [Str2, Str4, Str5, Str7]
2) OutputOutsideM = [Str1, Str3, Str6]
3) OutputBetweenM_Edited = [Str2Edited, Str4Edited, Str5Edited, Str7Edited]
4) Output3 = [Str1, Str2Edited, Str3, Str4Edited, Str5Edited, Str6, Str7Edited]
and finally rewrite the new sentence by adding the new items in Output3 together (easy to me) to get this:
let Final_sentence = "Str1 {M} Str2Edited {/M} Str3 {M} Str4Edited {/M} {M} Str5Edited {/M} Str6 {M} Str7Edited {/M}"
That is what I try to do:
1st code:
let from = NSRegularExpression.escapedPattern(for: "{M}") // escapedPattern
let to = NSRegularExpression.escapedPattern(for: "{/M}")
let regex = "(?<=\(from))(.*?)(?=\(to))"
let ranges = sentence.ranges(of: regex, options: .regularExpression)
let matches = ranges.map{ sentence[$0] }
print(matches) /* OutputBetweenM: [" Str2 ", " Str4 ", " Str5 ", " Str7 "] ( Correct ) */
2nd Code:
let from = NSRegularExpression.escapedPattern(for: "{M}") // escapedPattern
let to = NSRegularExpression.escapedPattern(for: "{/M}")
let regexIncluding = from + ".*?" + to
let rangesIncluding = sentence.ranges(of: regexIncluding, options: .regularExpression)
var mutableSentence = sentence
print(mutableSentence)
for range in rangesIncluding.reversed() {
mutableSentence.replaceSubrange(range, with: "\n")
}
let excludedOnes = mutableSentence.components(separatedBy: .newlines)
print(excludedOnes) /* OutputOutsideM: ["Str1 ", " Str3 ", " ", " Str6 ", ""] ( InCorrect :/)
Correct one : ["Str1 ", " Str3 ", " Str6 "] */
Extension used: from a post in this page : Index of a substring in a string with Swift
func ranges(of string: String, options: CompareOptions = .literal) -> [Range<Index>] {
var result: [Range<Index>] = []
var start = startIndex
while let range = range(of: string, options: options, range: start..<endIndex) {
result.append(range)
start = range.lowerBound < range.upperBound ? range.upperBound : index(range.lowerBound, offsetBy: 1, limitedBy: endIndex) ?? endIndex
}
return result
}
And after that , I don't know how I can put them like Output3 , thx to @leo-dabus for his help.
Thanks in advance!
The question it is not so clear but if I understood correctly that should be simple. You just need to zip together the excludedOnes and the edited ones, enumerate the zipped array and append each element of the tuple to the Output3. Once you have the Output3 array just filter where trimmingCharacters(in: .whitespaces) is not equal to an empty string and replace the ranges found with your edited array:
let excludedOnes = ["Str1 ", " Str3 ", " ", " Str6 ", ""]
let OutputBetweenM_Edited = ["Str2Edited", "Str4Edited", "Str5Edited", "Str7Edited"]
let zipped = zip(excludedOnes,OutputBetweenM_Edited)
print(zipped)
var output3: [String] = []
for item in zipped {
output3.append(item.0)
output3.append(item.1)
}
output3 = output3.filter{ $0.trimmingCharacters(in: .whitespaces) != "" }
print("output3:",output3)
output3: ["Str1 ", "Str2Edited", " Str3 ", "Str4Edited", "Str5Edited", " Str6 ", "Str7Edited"]
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