Knowledge Base Contributions

Below is a list of the knowledge base entries that saimon say has contributed to:

• how can i define a friend class for given class?(like in c++)
  

• How do you get the week of a date in the past? Example: 12/02/2021 = week(6)
  

• How can I make a string that will give me yesterdays date? so if today is Nov 22 2004 = Nov 21 2004
  

• How do I call the parent's constructor without knowing the class name of the parent?