// The Coding Train / Daniel Shiffman

// https://thecodingtrain.com/CodingChallenges/156-pi-digits.html

// https://editor.p5js.org/codingtrain/sketches/U649qYR4

​

let raw;

let digits, searchBox;

let indexP;

​

function preload() {

  // Download the sketch to work with a larger

  // text file with more digits

  raw = loadStrings("pi-thousand.txt");

}

​

function indexOf(txt, search) {

  let start = search.charAt(0);

  for (let i = 0; i < txt.length; i++) {

    if (txt.charAt(i) === start) {

      let found = true;

      for (let j = 1; j < search.length; j++) {

        if (txt.charAt(i + j) !== search.charAt(j)) {

          found = false;

          break;

        }

      }

      if (found) {

        return i;

      }

    }

  }

  return -1;

}

​

function searchItUp() {

  let search = searchBox.value();

  console.log(search);

​

  // let index = digits.indexOf(search, 2);

​

  let index = indexOf(digits, search);

​

  if (index > 0) {

    indexP.html(index - 1);

  } else {

    // This is just a demo with a small file of digits

    indexP.html("not found in the first 1 thousand digits");

​

    // indexP.html('not found in the first 1 million digits');

  }

}

​

function setup() {

  noCanvas();

​

  digits = raw[0];

  searchBox = createInput("");

  searchBox.input(searchItUp);

  indexP = createP("searching");

}

​