Question regarding indexOf

iakovos

indexOf returns the index position of the first occurrence of a substring, is it possible to return all of the occurrences of a substring (character) in the same way?

TfGuy44

You can write your own function to do this. Just start searching again using the optional fromIndex parameter, which should be one more than the last result. Just keep finding more matches until you get a -1 match, which means there's no more.

https://processing.org/reference/String_indexOf_.html

iakovos

hmm I am not really sure I understand your solution, at the moment i am using indexOf in order to look for vowels from Strings(sentences), and when a vowel is found, an action is triggered, but indexOf only finds the first occurrence

TfGuy44

String str = "Cat Hat Mat Flat Bat";

void matcher(String in, String find){
  int index = 0;
  int last = -1;
  while(index != -1){
    index = in.indexOf(find, last+1);
    if( index != -1 ){
      println(index);
      last = index;
    }
  }
}

void setup(){
  size(200,200);
  matcher(str, "at");  
  exit();
}
void draw(){}

iakovos

Thank you sir!