DoCP: Lesson 1

#####Notes - Test driven - Extreme value - lexigraphic ordering - use the comparator function, not the item itself - computing v.s. doing - computing: return result, pure functions - doing: doesn’t return result, inpure functions or subroutines

    It's easy to test pure functions

#####Python features:

• Same function can have different return type(dynamic typing system)
• The use of ‘–234’.index(r)
• The use of list.count
• list: reversed

#####Refactoring

• DRY: don’t repeat yourself

#####Lesson Learned

• understand
• define pieces
• reuse
• test
• explore the design space
  • correctness
  • efficiency
  • elegance
  • features