p5.js中p5.TypedDict的clear()方法用於刪除類型字典中的所有鍵值對。鍵值對是一組相互映射的兩個值。可以通過使用該對的關鍵字部分查詢此字典來訪問這些值。一個類型化的字典可以存儲可以使用字典方法訪問的多個鍵-值對。
用法:
clear()
參數:此方法不接受任何參數。
以下示例說明了p5.js中的clear()方法:
例:
Javascript
function setup() {
createCanvas(550, 500);
textSize(16);
let tmpObj = {
"Statue of Unity":"182 m",
"Spring Temple Buddha":"128 m",
"Ushiku Daibutsu":"100 m",
"Great Buddha of Thailand":"92m"
};
// Create a new dictionary
let stringDict =
createStringDict(tmpObj);
text("New string dictionary created " +
"with four keys", 20, 40);
// Check for a key
let existOne =
stringDict.hasKey('Spring Temple Buddha');
text("Dictionary has key " +
"'Spring Temple Buddha':" +
existOne, 20, 80);
// Check the current size
let currSize = stringDict.size();
text("Current size of the dictionary:" +
currSize, 20, 100);
// Clear the dictionary
stringDict.clear();
text("Dictionary has been cleared!",
20, 140);
// Check for a key again
existOne =
stringDict.hasKey('Spring Temple Buddha');
text("Dictionary has key " +
"'Spring Temple Buddha':" +
existOne, 20, 180);
// Check the current size again
currSize = stringDict.size();
text("Current size of the dictionary:" +
currSize, 20, 200);
}
輸出:
在線編輯: https://editor.p5js.org/
環境設置: https://www.geeksforgeeks.org/p5-js-soundfile-object-installation-and-methods/
參考: https://p5js.org/reference/#/p5.TypedDict/clear
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注:本文由純淨天空篩選整理自sayantanm19大神的英文原創作品 p5.js TypedDict clear() Method。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。