chaitanyav/haskell_practice

haskell_practice

References

• Learn You a Haskell for Great Good! by Miran Lipovaca
• Real World Haskell by Bryan O'Sullivan, Don Stewart, and John Goerzen

Notes

• Type classes
  • Eq is used for types that support equality testing. The functions its members implement are == and /=
  • Ord is for types that have an ordering. Ord covers all the standard comparing functions such as >, <, >= and <=
  • Ordering is a type that can be GT, LT or EQ
  • Members of Show can be presented as strings
  • Read is sort of the opposite typeclass of Show
  • Enum members are sequentially ordered types — they can be enumerated. The main advantage of the Enum typeclass is that we can use its types in list ranges
  • Bounded members have an upper and a lower bound
  • Num is a numeric typeclass. To join Num, a type must already be friends with Show and Eq
  • Integral is also a numeric typeclass. Integral includes only integral (whole) numbers. In this typeclass are Int and Integer
  • Floating includes only floating point numbers, so Float and Double.