Class Stack

Class represeting LIFO data structure. The last element added to the stack will be the first one to be removed.

BN\Collections\LinearDataStructure

Extended by

BN\Collections\Stack

Namespace: BN\Collections
Located at lib/BN/Collections/Stack.php

Methods summary
`public`	# `push( mixed $element )` Inserts element to the beggining of the stack Inserts element to the beggining of the stack Parameters `$element` `mixed` $element Throws `BN\Collections\NullArgumentException`
`public mixed`	# `pop( )` Removes and returns first element of the stack. Returns null if the stack is empty Removes and returns first element of the stack. Returns null if the stack is empty Returns `mixed`
`public mixed`	# `peek( )` Returns first element of the stack (element is not removed from the stack). Returns null if the stack is empty Returns first element of the stack (element is not removed from the stack). Returns null if the stack is empty Returns `mixed`

Methods inherited from BN\Collections\LinearDataStructure
`checkIfElementIsNotNull(), clear(), isEmpty(), size()`

Properties inherited from BN\Collections\LinearDataStructure
`$data`