Day12: Key Sequence Detection

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1const pressed = [];
2const secretCode = "ok";
3
4window.addEventListener("keyup", (e) => {
5  //把按下的鍵盤元素加入陣列
6  pressed.push(e.key);
7
8  //透過運算使pressed陣列長度始終與設定密碼相同，且當超出時替換掉陣列第一個元素
9  pressed.splice(-secretCode.length - 1, pressed.length - secretCode.length);
10  //判斷輸入值陣列的內容是否與設定密碼相同
11  if (pressed.join("").includes(secretCode)) {
12    cornify_add();
13  }
14});

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1const months = ["Jan", "March", "April", "June"];
2months.splice(1, 0, "Feb"); //["Jan", "Feb", "March", "April", "June"]
3
4const arr = [1, 2, 3];
5arr.splice(0, 1); //[2,3]

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1const elements = ["Fire", "Air", "Water"];
2
3console.log(elements.join());
4// expected output: "Fire,Air,Water"
5
6console.log(elements.join(""));
7// expected output: "FireAirWater"
8
9console.log(elements.join("-"));
10// expected output: "Fire-Air-Water"

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1const pets = ["cat", "dog", "bat"];
2
3console.log(pets.includes("cat"));
4// expected output: true
5
6console.log(pets.includes("at"));
7// expected output: false