43 lines
861 B
JavaScript
43 lines
861 B
JavaScript
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class CircularQueue {
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constructor(size) {
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this.queue = [];
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this.read = 0;
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this.write = 0;
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this.max = size - 1;
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while (size > 0) {
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this.queue.push(null);
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size--;
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}
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}
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print() {
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return this.queue;
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}
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enqueue(item) {
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// Only change code below this line
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if (this.queue[this.write] === null) {
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this.queue[this.write++] = item;
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if (this.write > this.max) this.write = 0;
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return item;
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}
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return null;
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// Only change code above this line
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}
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dequeue() {
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// Only change code below this line
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if (this.queue[this.read] === null) {
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return null;
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}
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const item = this.queue[this.read];
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this.queue[this.read++] = null;
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if (this.read > this.max) this.read = 0;
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return item;
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// Only change code above this line
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}
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}
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const q = new CircularQueue(5);
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