# Blog articles

From HaskellWiki

Many areas of Haskell have been explored in the form of blog posts. This page collects the best of those articles from across the web.

## Contents

- 1 Introductions to Haskell
- 2 Comparisons to other languages
- 3 Functional programming
- 4 Programming exercises
- 5 Laziness
- 6 Records
- 7 IO
- 8 Network
- 9 Parallelism and Concurrency
- 10 Performance
- 11 Parsing
- 12 Code generation
- 13 Monads
- 14 Error handling and exceptions
- 15 Types
- 16 Data structures
- 17 Algorithms and techniques
- 18 GUIs
- 19 Databases
- 20 Graphics
- 21 Web and XML
- 22 Maths
- 23 Testing, correctness and proofs
- 24 Regular expressions
- 25 The foreign function interface
- 26 Tips and tricks
- 27 Cabal and libraries
- 28 Robots and Hardware
- 29 Neural networks

### Introductions to Haskell

### Comparisons to other languages

### Functional programming

- A fold-like procedure in C
- What's wrong with for loops
- More on what's wrong with for loops
- Liberating Myself from the von Neumann Style
- Programming Productivity and Programming Languages
- Haskell - A valuable language
- On Functional Programming
- Functional programming is a silver bullet
- Silver Bullets Incoming!
- Computers were invented to keep track of boring things
- Functional programming for the rest of us
- Zen and the Art of Functional Programming
- Thinking in types

### Programming exercises

- Diff in Haskell
- Introductory Haskell: Solving the Sorting-It-Out Kata
- A Simple RPN Calculator in Haskell
- Eratosthenes sieve
- Software Cipher
- Secret Santas in Haskell I: Preliminaries
- Secret Santas in Haskell II: Orbits and Lists
- Secret Santas in Haskell III: Lather, Rinse, Repeat 1
- The Dot-Matrix Printhead: a Haskell Toy
- The Revised Dot-Matrix Printhead
- Run length encoding:
- Overlap function in Haskell for rectangles
- Tying Knots Generically
- A quick and dirty theorem prover in Haskell
- Brainf*k interpreter in Haskell
- FourFours in Haskell
- Using Bayesian filtering instead of 'if' in Haskell
- Prime sieves in Haskell
- Bowling in Haskell
- Norvig's spell checker and idiomatic Haskell

#### Games

### Laziness

### Records

### IO

- Haskell I/O for imperative programmers
- Directory tree printing:
- Introductory console IO in Haskell
- Listing files in Haskell
- Playing unsafe Haskell
- separating IO from logic -- example
- Programming Haskell
- Design Patterns in Haskell: bracket
- 7 Rules for IO in Haskell
- File related hacking

#### Command line arguments

#### Unix

- Simple Unix Tools in Elegant Haskell
- HSH: a Haskell scripting environment
- Function composition and unix pipes
- Practical Haskell: shell scripting with error handling and privilege separation
- A simple file filter
- Signal handling

### Network

### Parallelism and Concurrency

- Threads Considered Harmful (discusses The Problem with Threads)
- STM and IO
- Synchronised threads:
- More Haskell parallelism

### Performance

### Parsing

- Parser combinators
- Monadic parsing
- Adventures in Haskell: the Parsec magic weapon
- Adventures in Haskell: parsing the game world
- Combinator parsing
- Parser with Writer monad
- Simple Parsec Example: HTMangL
- Parsers, Parsec and Haskell
- Interesting parsers in Haskell
- Explicit Typing, Trail Blazing, and Packrat Parsing
- Playing fast and loose with Parsec for parsing in Haskell
- Config file parsing
- Parsing JSON in Haskell
- Write yourself a Scheme in 48 hours
- A beginner with Parsec

### Code generation

- Writing x86 code generators with Harpy:

### Monads

- The monad laws
- The Trivial Monad
- Tracking tainted data: Homeland Security Threat Level Monad
- Monads: a field guide
- Variable substitution gives a ... monad
- The monad behind every zipper
- Monads for vector spaces, probability and quantum mechanics pt. I
- Monads, Vector Spaces and Quantum Mechanics pt. II
- How to write tolerably efficient optimzation code without really trying...
- Quick interpreters with the Reader monad
- Monads
- More on Haskell, Side Effects and Code Reuse
- A First Step Into Monads
- More Monads: Stateful Programming
- The theory of monads
- A newbie in Haskell land or another monad tutorial
- A newbie in Haskell land : The (->) monad
- Smart classification using Bayesian monads
- 3 open problems with monads
- Monads in 15 minutes: Backtracking and Maybe
- How to make Data.Set a monad
- Monads work because they have a tight interface
- Haskell: bootstrapping into a clue about monads
- Why monads matter
- Monads through Pictures
- Monads as universe helpers
- Simple state monad
- repeat and sequence
- What's a monad?

#### Monad transformers

- A twisted history of monad transformers
- How To Use Monad Transformers
- Local and global side effects with monad transformers
- Grok monad transformers
- A Simple Game with StateT

#### Arrows

#### Comonads

- Comonads and reading from the future
- Evaluating cellular automata is co-monadic
- Understanding comonads

### Error handling and exceptions

- Error handling in Haskell
- Some Very Basic Haskell and Thoughts on Error Diagnosis
- 8 ways to report errors in Haskell
- Towards Better Error Handling

### Types

- A type-based solution to the 'strings problem'
- Generalised Algebraic Data Types, Phantom Types, and Dependent Types
- Functions, Types, Function Types, and Type Inference
- Building Datatypes in Haskell (part 1)
- Rank-2 polymorphism is a strange thing
- Scientific.Dimension: Type Arithmetic and Physical Units in Haskell

#### Type classes

### Data structures

- Queues without pointers
- A Tree Grows Up in Haskell: Building a Dictionary Type
- Haskell Stacks : Two Different Ways
- A counter datatype with constant-time update
- Map fusion: Making Haskell 225% faster
- Roll Your Own Window Manager: Tracking Focus with a Zipper

#### Strings

### Algorithms and techniques

#### Folds

#### Dynamic programming

#### Mutable data

#### Sections and Currying

### GUIs

### Databases

### Graphics

### Web and XML

### Maths

### Testing, correctness and proofs

- Introduction to QuickCheck
- QuickChecking a window manager
- On Unit Testing and Type Safety
- Robustness and QuickCheck
- Does XMonad crash? On proving pattern coverage with Catch
- Preconditions on XMonad

### Regular expressions

### The foreign function interface

- Simple demonstration of Haskell FFI
- C and Haskell sitting in a tree
- Haskell and C: functions returning more than one value

### Tips and tricks

### Cabal and libraries

- Cabal and rpms
- Getting started with installing third-party Haskell packages
- The lambda revolution: how you can help
- The lambda revolution, Episode V, the deb strikes back
- Questions on Haskell Style (and Polynomials redux)
- Using the Haskell package system
- How To Install Haskell Haddock on Mac OS X