The Stack class

(PECL ds >= 1.0.0)

Introduction

A Stack is a “last in, first out” or “LIFO” collection that only allows access to the value at the top of the structure and iterates in that order, destructively.

Uses a Ds\Vector internally.

Class synopsis

class Ds\Stack implements Ds\Collection, ArrayAccess {

/* Methods */

public allocate(int $capacity): void

public capacity(): int

public clear(): void

public copy(): Ds\Stack

public isEmpty(): bool

public peek(): mixed

public pop(): mixed

public push(mixed ...$values): void

public toArray(): array

}

Changelog

Version	Description
PECL ds 1.3.0	The class now implements ArrayAccess.

Ds\Stack::allocate — Allocates enough memory for a required capacity
Ds\Stack::capacity — Returns the current capacity
Ds\Stack::clear — Removes all values
Ds\Stack::__construct — Creates a new instance
Ds\Stack::copy — Returns a shallow copy of the stack
Ds\Stack::count — Returns the number of values in the stack
Ds\Stack::isEmpty — Returns whether the stack is empty
Ds\Stack::jsonSerialize — Returns a representation that can be converted to JSON
Ds\Stack::peek — Returns the value at the top of the stack
Ds\Stack::pop — Removes and returns the value at the top of the stack
Ds\Stack::push — Pushes values onto the stack
Ds\Stack::toArray — Converts the stack to an array

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