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Howto sum up a list?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg106913] Howto sum up a list?
  • From: Jonas Stein <news at jonasstein.de>
  • Date: Thu, 28 Jan 2010 02:43:17 -0500 (EST)

How can i sum up the list:

MyList = {{eggs, 4}, {milk, 1}, {eggs, 1}, {milk, 1}}

I want to get something like: 

{{eggs, 5},{milk, 2}}

I tyied Tally[], but that ignored the factor 4 in {eggs, 4}

Thank you. 

-- 
Jonas Stein <news at jonasstein.de>


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