Class: RubyCollections::Stack

Inherits:

Object

• Object
• RubyCollections::Stack

Defined in:

lib/ruby_collections/stack.rb

Instance Method Summary

• #initialize(arr = []) ⇒ Stack constructor

  A new instance of Stack.

• #isEmpty? ⇒ Boolean
• #pop ⇒ Object
• #push(e) ⇒ Object
• #size ⇒ Object
• #top ⇒ Object

Constructor Details

#initialize(arr = []) ⇒ Stack

Returns a new instance of Stack.

# File 'lib/ruby_collections/stack.rb', line 4

def initialize(arr = [])
  @arr = arr
end

Instance Method Details

#isEmpty? ⇒ Boolean

Returns:

• (Boolean)

# File 'lib/ruby_collections/stack.rb', line 12

def isEmpty?
  @arr.size.zero?
end

#pop ⇒ Object

# File 'lib/ruby_collections/stack.rb', line 24

def pop
  @arr.shift
end

#push(e) ⇒ Object

# File 'lib/ruby_collections/stack.rb', line 20

def push(e)
  @arr.unshift(e)
end

#size ⇒ Object

# File 'lib/ruby_collections/stack.rb', line 8

def size
  @arr.size
end

#top ⇒ Object

# File 'lib/ruby_collections/stack.rb', line 16

def top
  @arr[0]
end