Haskell 101

Haskell 101: Learn the fundamental concepts of this purely functional programming language, including referential transparency, laziness, and first-class functions, and discover how to write efficient and elegant code.

Key takeaways

Haskell is a purely functional programming language, which means it strictly adheres to the concept of referential transparency and does not have mutable state.
Haskell is lazily evaluated, meaning that the value of an expression only needs to be computed if its value is actually used.
Functions in Haskell are first-class citizens, meaning they can be passed around like any other value and composed together to create new functions.
The let keyword is used to define local variables and functions, and the in keyword is used to specify the scope of the binding.
Pattern matching is a way to define functions that can handle different cases based on the input.
The f and g functions are first-class functions, which means they can be passed around and composed together.
The map function is a higher-order function that takes a function as an argument and applies it to every element of a list.
The fold function is a way to reduce a list to a single value by applying a function to each element.
The ++ operator is used to concatenate lists, and the Head function is used to extract the first element of a list.
The Bool type is a type with two possible values, true and false.
The Maybe type is a type that can have two possible values, Nothing or Just x, where x is a value.
The IO type is a type that can perform I/O operations, such as reading or writing to a file.
The type keyword is used to define a type alias, which is a way to give a name to a type.
The let keyword is used to define local variables and functions, and the in keyword is used to specify the scope of the binding.
Pattern matching is a way to define functions that can handle different cases based on the input.
The || operator is used to compose functions together.
The composition function is a way to compose functions together.
The flip function is a way to flip the arguments of a function.

Haskell 101

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