self-training

Python :

• dictionary
• list
• module
• oop
• tuple
• iterations
• lambda
• variables

JavaScript (es6):

• factorypattern
• method chaining pattern
• null object pattern
• proxy pattern
• singleton pattern
• currying

Java :

• oop-clock
• factory pattern
• immutable classes
• method chaining pattern
• null object pattern
• IEnum (store all of your Constants in one Interface sperated by different topics)
• proxy pattern
• singleton pattern / thread safe singleton pattern