How to make sketch look through string + make a println showing number of occurrences of each vowel?

TheTurtle413

I need to make the sketch search through the string "The unusually quick brown fox jumps over the lazy family dog repeatedly." and make a (println) output report showing the number of occurrences for each vowel (a,e,i,o,u). I made some code, but I got stuck. For example, the println showed 9 for the vowel a even though the vowel a occurs four times in the string. What am I doing wrong? Thanks.

String sentence = "The unusually quick brown fox jumps over the lazy family dog repeatedly.";
println(sentence.indexOf("a"));
println(sentence.indexOf("e"));
println(sentence.indexOf("i"));
println(sentence.indexOf("o"));
println(sentence.indexOf("u"));
noLoop();

blindfish

indexOf() gives you the position of the first instance of the search term in the string, starting at zero... So it's not what you want.

blindfish

You could use matchAll. Since this is obviously homework I'll leave you to figure it out ;)

GoToLoop

// forum.Processing.org/two/discussion/13750/
// how-to-make-sketch-look-through-string-
// make-a-println-showing-number-of-occurrences-of-each-vowel

// GoToLoop (2015-Dec-02)

static final int getVowelValue(char ch) {
  switch (ch) {
    case 'a': return 0;
    case 'e': return 1;
    case 'i': return 2;
    case 'o': return 3;
    case 'u': return 4;
    default:  return -1;
  }
}

static final String SENTENCE = 
  "The unusually quick brown fox " +
  "jumps over the lazy family dog repeatedly.";

final int[] vowels = new int[5];

void setup() {
  for (char ch : SENTENCE.toLowerCase().toCharArray()) {
    int idx = getVowelValue(ch);
    if (idx >= 0 & idx < vowels.length)  ++vowels[idx];
  }

  printArray(vowels);
  exit();
}

benja

Pretty much the same question was asked some days ago: https://forum.processing.org/two/discussion/13665/how-to-count-the-repeated-alphabet-in-sketch

The link i posted has some good proposals.