Class: Array

Inherits:
Object show all
Defined in:
lib/ramaze/snippets/array/put_within.rb

Overview

Copyright © 2008 Michael Fellinger [email protected] All files in this distribution are subject to the terms of the Ruby license.

Instance Method Summary collapse

Instance Method Details

#put_after(element, object) ⇒ Object

a = [1, 2, 3]

a.put_after(2, 4)
a # => [1, 2, 4, 3]

Raises:

  • (ArgumentError) 


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# File 'lib/ramaze/snippets/array/put_within.rb', line 24

def put_after(element, object)
  raise ArgumentError, "The given element doesn't exist" unless include?(element)
  self[index(element) + 1, 0] = object
end

#put_before(element, object) ⇒ Object

a = [1, 2, 3]

a.put_before(2, 4)
a # => [1, 4, 2, 3]

Raises:

  • (ArgumentError) 


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# File 'lib/ramaze/snippets/array/put_within.rb', line 33

def put_before(element, object)
  raise ArgumentError, "The given element doesn't exist" unless include?(element)
  self[rindex(element), 0] = object
end

#put_within(object, constrain) ⇒ Object

a = [1, 2, 3]

a.put_within(4, :after => 2, :before => 3)
a # => [1, 2, 4, 3]



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# File 'lib/ramaze/snippets/array/put_within.rb', line 10

def put_within(object, constrain)
  pre, post = constrain.values_at(:after, :before)

  unless rindex(post) - index(pre) == 1
    raise ArgumentError, "Too many elements within constrain"
  end

  put_after(pre, object)
end