problem about friend-Collection of common programming errors

• 
  allo
  database django models friend friendship
  What is the best way to model friendships between users for a social networking site?The possible states are:no Friendship FriendRequest from A to B, B needs to confirm (this is asymmetric) A and B are friends (this is symmetric)now its complicated to choose the models right.My Friends are part of my profilequite obvious, A.profile.friends is a many to many relation to other users.no friendship: B not in A.friends and A not in B.friends A requests friendship with B: B in A.friends F
• 
  Lee Jae Beom
  c++ templates compiler-errors friend template-specialization
  #include using namespace std; template class test {T y;public:test(T k) : y(k) {}friend int a(T& x); };template int a(T& x) {cout

  user), :method => :post%>

  The following error occurs:NoMethodError in Profiles#showShowing /Users/mgoff1/LOAP_1.2.2/app/views/profiles/show.html.erb where line #13 raised: undefined method `each’ for nil:NilClass Extracted source (around line #13): 10: 11: 12: 13: 14: 15:

  16:

Originally posted 2013-11-09 22:46:08.