src/structures/Stack.ts
import isFunction from '~/is/isFunction'
export class Stack<T> {
protected data: T[] = []
public push(item: T): void {
this.data.push(item)
}
public pull(): T | undefined {
return !this.isEmpty() ? this.data.pop() : undefined
}
public peek(): T | undefined {
return !this.isEmpty() ? this.data[this.size() - 1] : undefined
}
public size(): number {
return this.data.length
}
public isEmpty(): boolean {
return this.data.length === 0
}
public toArray(): T[] {
return [...this.data].reverse()
}
public toString(callback?: (i: T) => any): string {
const data = this.toArray()
if (callback && isFunction(callback)) {
return data.map(item => callback(item)).toString()
}
return data.toString()
}
}
export default new Stack()