Own method has_key for class Hash. -howto

ruby-talk
1

Dear all,

Can you help me how can I implement my own "has_key" method for "hash class."

class Hash

  def my_each_key(&block)
    self.each { |key|
    yield(key[0])
    }
  end
  
  def my_each_value(&block)
    self.each { |value|
    yield(value[1])
    }
  end

  def has_key()
    #todo
  end

end

h = {1 => 1.0, 2 => 2.0, 3 => 3.0 }

many thanks in advance,

salai.

2

I was able able solve the problem ...

  def has_key(k)
    self.each { |k|
    k = k[0]
    }
    return k
  end

is there any other better/easier solution?

regards,

salai.

···

On Wed, Jul 8, 2009 at 6:33 PM, salai<sayakyi@gmail.com> wrote:

Dear all,

Can you help me how can I implement my own "has_key" method for "hash class."

class Hash

   def my\_each\_key\(&amp;block\)
           self\.each \{ |key|
           yield\(key\[0\]\)
           \}
   end

   def my\_each\_value\(&amp;block\)
           self\.each \{ |value|
           yield\(value\[1\]\)
           \}
   end

   def has\_key\(\)
           \#todo
   end

end

h = {1 => 1.0, 2 => 2.0, 3 => 3.0 }

many thanks in advance,

salai.

3

Dear all,

Can you help me how can I implement my own "has_key" method for "hash class."

class Hash
   def my_each_key(&block)

[...]

   def my_each_value(&block)

[...]

   def my_has_key?(key)

          keys.include?(key)

···

At 2009-07-08 12:33PM, "salai" wrote:

   end

--
Glenn Jackman
    Write a wise saying and your name will live forever. -- Anonymous

4

thank you!.

···

On Wed, Jul 8, 2009 at 8:05 PM, Glenn Jackman<glennj@ncf.ca> wrote:

At 2009-07-08 12:33PM, "salai" wrote:

Dear all,

Can you help me how can I implement my own "has_key" method for "hash class."

class Hash
def my_each_key(&block)

[...]

  def my\_each\_value\(&amp;block\)

[...]

  def my\_has\_key?\(key\)

     keys\.include?\(key\)

  end

--
Glenn Jackman
Write a wise saying and your name will live forever. -- Anonymous