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feat(ts): stack and queue implementation #775

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52 changes: 52 additions & 0 deletions contents/stacks_and_queues/code/typescript/queue.ts
Original file line number Diff line number Diff line change
@@ -0,0 +1,52 @@
interface IQueue<T> {
/**
* `dequeue` removes first element from the queue and returns the same
*/
dequeue(): T;
/**
* `enqueue` adds element to last of the queue and returns the size
*/
enqueue(data: T): number;
/**
* `size` return size or length of the queue
*/
size(): number;
/**
* `front` returns first element of the queue
*/
front(): T;
}

class Queue<T> implements IQueue<T> {
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@leios do we have standards for TypeHinting in the interface names?

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I don't think so. Maybe we should add something to the code style guide?

private readonly list: Array<T> = [];

public enqueue(data: T) {
return this.list.push(data);
}

public dequeue() {
return this.list.shift();
}

public size() {
return this.list.length;
}

public front() {
return this.list[0];
}
}

function exampleQueue() {
const numberQueue = new Queue<number>();

numberQueue.enqueue(4);
numberQueue.enqueue(5);
numberQueue.enqueue(9);

console.log(numberQueue.dequeue());
console.log(numberQueue.size());
console.log(numberQueue.front());
}

exampleQueue();
52 changes: 52 additions & 0 deletions contents/stacks_and_queues/code/typescript/stack.ts
Original file line number Diff line number Diff line change
@@ -0,0 +1,52 @@
interface IStack<T> {
/**
* `pop` removes last element from the stack and returns the same
*/
pop(): T;
/**
* `push` adds element to last of the stack and returns the size
*/
push(data: T): number;
/**
* `size` return size or length of the stack
*/
size(): number;
/**
* `top` returns last element of the stack
*/
top(): T;
}

class Stack<T> implements IStack<T> {
private readonly list: Array<T> = [];

public push(data: T) {
return this.list.push(data);
}

public pop() {
return this.list.pop();
}

public size() {
return this.list.length;
}

public top() {
return this.list[this.list.length - 1];
}
}

function exampleStack() {
const numberStack = new Stack<number>();

numberStack.push(4);
numberStack.push(5);
numberStack.push(9);

console.log(numberStack.pop());
console.log(numberStack.size());
console.log(numberStack.top());
}

exampleStack();