p5.js | createStringDict()函数
createStringDict()函数用于使用给定数据创建 p5.StringDict 实例。数据可以作为键值对单独传递,也可以使用对象作为值的集合给出。
句法:
createStringDict(key, value)
或者
createStringDict(object)
参数:
- key:它指定用作字典中的键的字符串。
- value:它指定用作字典中的值的字符串。
- object:它指定用作字典的对象。
返回值:它返回一个带有给定数据的p5.StringDict对象。
下面的程序说明了 p5.js 中的createStringDict()函数:
示例 1:
javascript
function setup() {
createCanvas(500, 200);
textSize(20);
// Creating a string dictionary
// with the given key and value pair
let mydict = createStringDict("title", "GeeksForGeeks");
// Accessing the data using the data property
text('The dictionary has the following data under "title":', 20, 20);
text(mydict.data.title, 20, 40);
// Checking if a key exists in the dictionary
text('The dictionary has the "title" key present:', 20, 80);
text(mydict.hasKey("title"), 20, 100);
text('The dictionary has the "author" key present:', 20, 140);
text(mydict.hasKey("author"), 20, 160);
}
javascript
function setup() {
createCanvas(600, 200);
textSize(20);
let obj = {
book: "Let Us C",
author: "Yashavant Kanetkar",
language: "English"
}
// Creating a string dictionary
// with the above object
let mydict = createStringDict(obj);
// Accessing the data using the data property
text('The dictionary has the following data under "title":', 20, 20);
text(mydict.data.book, 20, 40);
text('The dictionary has the following data under "author":', 20, 80);
text(mydict.data.author, 20, 100);
text('The dictionary has the following data under "language":', 20, 140);
text(mydict.data.language, 20, 160);
}
输出:
示例 2:
javascript
function setup() {
createCanvas(600, 200);
textSize(20);
let obj = {
book: "Let Us C",
author: "Yashavant Kanetkar",
language: "English"
}
// Creating a string dictionary
// with the above object
let mydict = createStringDict(obj);
// Accessing the data using the data property
text('The dictionary has the following data under "title":', 20, 20);
text(mydict.data.book, 20, 40);
text('The dictionary has the following data under "author":', 20, 80);
text(mydict.data.author, 20, 100);
text('The dictionary has the following data under "language":', 20, 140);
text(mydict.data.language, 20, 160);
}
输出:
在线编辑器: https://editor.p5js.org/
环境设置: https://www.geeksforgeeks.org/p5-js-soundfile-object-installation-and-methods/
参考: https://p5js.org/reference/#/p5/createStringDict