Primitive predicate string :: indexOf

Returns the index of the n’th (starting at 0) occurrence of the given string within the receiver, starting at the given 0-based offset. Has no result if the string does not occur in the receiver.


                            
                                
                                    int
                                
                                 
                            
                            
                                indexOf
                            
                            
                                (
                                
                                    
                                        string
                                    
                                     
                                    substringToFind
                                
                                , 
                                
                                    
                                        int
                                    
                                     
                                    n
                                
                                , 
                                
                                    
                                        int
                                    
                                     
                                    startAt
                                
                                )