rewrites/numerical-stack.ts at main · zsakowitz/rewrites · GitHub

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// A Stack implementation that only accepts numbers.

export class Stack {
    #stack: number[] = []

    get length() {
        return this.#stack.length
    }

    push(value: number) {
        this.#stack.push(value)
        return this.#stack
    }

    pop() {
        return this.#stack.pop()
    }

    add() {
        this.#stack.push(this.#stack.pop()! + this.#stack.pop()!)
    }

    sub() {
        const b = this.#stack.pop()!
        const a = this.#stack.pop()!

        this.#stack.push(a - b)
    }

    mul() {
        this.#stack.push(this.#stack.pop()! * this.#stack.pop()!)
    }

    div() {
        const b = this.#stack.pop()!
        const a = this.#stack.pop()!

        this.#stack.push(a / b)
    }

    mod() {
        const b = this.#stack.pop()!
        const a = this.#stack.pop()!

        this.#stack.push(a % b)
    }
}