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p5.js | createNumberDict() Function

  • Last Updated : 20 Feb, 2020

The createNumberDict() function is used to create a p5.NumberDict instance with the given data. The data can be individually passed a key-value pair or given as a collection of values using an object.

Syntax:

createNumberDict(key, value)

or

createNumberDict(object)

Parameters:

  • key: It specifies the number that is used as the key in the dictionary.
  • value: It specifies the number that is used as the value in the dictionary.
  • object: It specifies the object that is used as the dictionary.

Return Value: It returns a p5.NumberDict object with the given data.

The program below illustrate the createNumberDict() function in p5.js:

Example 1:




function setup() {
  createCanvas(500, 200);
  textSize(20);
  
  // Creating a number dictionary
  // with the given key and value pair
  let mydict = createNumberDict("19", "1999");
  
  // Accessing the data using the data property
  text('The dictionary has the following data under "19":', 20, 20);
  text(mydict.data["19"], 20, 40);
  
  // Checking if a key exists in the dictionary
  text('The dictionary has the "25" key present:', 20, 80);
  text(mydict.hasKey("19"), 20, 100);
  
  text('The dictionary has the "100" key present:', 20, 140);
  text(mydict.hasKey("100"), 20, 160);
}

Output:
ex1

Example 2:




function setup() {
  createCanvas(600, 200);
  textSize(20);
  
  let squaresObject = {
    2: 4,
    3: 9,
    4: 16,
    5: 25
  }
  
  // Creating a number dictionary
  // with the above object
  let mydict = createNumberDict(squaresObject);
  
  // Accessing the data using the data property
  text('The dictionary has the following data under key "2":', 20, 20);
  text(mydict.data["2"], 20, 40);
  
  text('The dictionary has the following data under key "4":', 20, 80);
  text(mydict.data["4"], 20, 100);
  
  text('The dictionary has the following data under key "5":', 20, 140);
  text(mydict.data["5"], 20, 160);
}

Output:
ex2

Online editor: https://editor.p5js.org/

Environment Setup: https://www.geeksforgeeks.org/p5-js-soundfile-object-installation-and-methods/

Reference: https://p5js.org/reference/#/p5/createNumberDict


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