How to find all positions of one string in another string in swift2 ?

Question

I can find first position of string \"ATG\" in myString \"ATGGACGTGAGCTGATCGATGGCTGAAATGAAAA\" (i.e. index range is 0..<3) by using code below. Question is how to find al

Answer 1

extension String {
    public func rangesOfString(searchString:String, options: NSStringCompareOptions = [], searchRange:Range? = nil ) -> [Range] {
        if let range = rangeOfString(searchString, options: options, range:searchRange) {

            let nextRange = Range(start:range.endIndex, end:self.endIndex)
            return [range] + rangesOfString(searchString, searchRange: nextRange)
        } else {
            return []
        }
    }
}