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Queue DS with all operations with UI #12

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merged 1 commit into from
Oct 10, 2022
Merged

Queue DS with all operations with UI #12

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100 changes: 100 additions & 0 deletions Queue/2.Queue-all-operations-with-Buttons.html
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Original file line number Diff line number Diff line change
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<!DOCTYPE html>
<html lang="en">

<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Queue</title>
</head>

<body>
<div align="center">
<h3>Queue with Function</h3>
<p>(Open console to check output)</p>

<div>
<div>
<input type="text" id="inputElem" />
<button onclick="enQueueData()"> EnQueue </button>
</div>
<br />
<div>
<button onclick="deQueue()"> DeQueue </button>
<button onclick="front()"> Get Front Data </button>
<button onclick="rear()"> Get Rear Data </button>
<button onclick="checkIsEmpty()"> Check Queue Empty </button>
<button onclick="display()"> Display </button>
</div>
</div>
</div>

<script>
let queue = [];
let currentIndex = queue.length;
let maxSize = 6;

function enQueue(newVal) {
if (currentIndex >= maxSize) {
console.error("Queue is already full");
return false;
}
queue[currentIndex] = newVal;
currentIndex++;
}

function deQueue() {
if (!isEmpty()) {
for (let i = 0; i < queue.length; i++) {
queue[i] = queue[i + 1];
}
currentIndex--;
queue.length--;
} else {
console.error("Queue is Empty.");
}
}

function display() {
console.log(queue);
}

function front() {
if (!isEmpty()) {
console.log(queue[0]);
} else {
console.error("Queue is Empty.");
}
}

function rear() {
if (!isEmpty()) {
console.log(queue[currentIndex - 1]);
} else {
console.error("Queue is Empty.");
}
}

function isEmpty() {
return currentIndex <= 0 ? true : false;
}

const enQueueData = () => {
let inputElem = document.getElementById("inputElem");
enQueue(inputElem.value);
inputElem.value = "";
}

const checkIsEmpty = () => {
console.log(isEmpty());
}

enQueue(5);
enQueue(10);
enQueue(8);
display();

</script>
</body>

</html>