p5.js TypedDict get()用法及代碼示例

let y = 0; 
  
function setup() { 
  createCanvas(550, 500); 
  textSize(16); 
  
  text("Click the buttons to create a " + 
       "dictionary or get the value of the key", 
       20, 20); 
  
  text("Key:", 20, 260); 
  
  key_input = createInput('user'); 
  key_input.position(70, 250); 
  key_input.size(80); 
  
  setBtn =  
    createButton("Create dictionary"); 
  setBtn.position(30, 40); 
  setBtn.mouseClicked(createNewDict); 
  
  getBtn =  
    createButton("Get the value of the given key"); 
  getBtn.position(30, 290); 
  getBtn.mouseClicked(getVal); 
} 
  
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); 
  
    let rkey = "user" + rk; 
    let rval = "data" + rn; 
    obj[rkey] = rval; 
  
    text("Key:" + rkey + "  Value:" + 
         rval, 40, 120 + 20 * i); 
  } 
  
  // Create a string dict using the above values 
  numDict = createStringDict(obj); 
  
  text("New Dictionary created with values", 
       20, 80); 
  
  text("Click the buttons to create a " + 
       "dictionary or get the value of the key", 
       20, 20); 
  
  text("Key:", 20, 260); 
} 
  
function getVal() { 
  
  // Get the key to be retrieved 
  let keyToCheck = key_input.value(); 
  
  // Get the value of the key from the dictionary 
  let keyVal = numDict.get(keyToCheck); 
  
  text("The value at key:" + keyToCheck + 
       " is:" + keyVal, 20, 340 + y * 20); 
  
  y++; 
  
  text("Click the buttons to create a " + 
       "dictionary or get the value of the key", 
       20, 20); 
}