p5.js NumberDict minValue() Method

function setup() {
  createCanvas(550, 300);
  textSize(16);

  text("Click on the button to create a " +
       "new dictionary and get the lowest value",
       20, 20);

  setBtn = 
    createButton("Create random dictionary");
  setBtn.position(30, 40);
  setBtn.mouseClicked(createNewDict);

  getBtn = createButton("Get Lowest Value");
  getBtn.position(300, 40);
  getBtn.mouseClicked(getLowestValue);
}

function createNewDict() {
  clear();

  // Create an object with random values
  let obj = {};
  for (let i = 0; i < 5; i++) {
    let rk = ceil(Math.random() * 100);
    let rn = floor(Math.random() * 100);
    rn = (rk > 50) ? rn : -rn;

    obj[rk] = rn;

    text("Key: " + rk + " : Value: " + 
         rn, 40, 120 + 20 * i);
  }

  // Create a dictionary using the
  // above values
  numDict = createNumberDict(obj);

  text("New Dictionary created with values",
       20, 80);

  text("Click on the button to create a " +
       "new dictionary and get the lowest value",
       20, 20);
}

function getLowestValue() {

  // Get the lowest value in the dictionary
  let lowestVal = numDict.minValue();

  // Display the lowest value
  text("The lowest value in the dictionary is: " +
       lowestVal, 20, 240);

  text("Click on the button to create a " +
       "new dictionary and get the lowest value",
       20, 20);
}