Paste number 30002: YAHT monad laws

Paste number 30002: | YAHT monad laws |

Pasted by: | dino- |

When: | 10 years, 2 weeks ago |

Share: | Tweet this! | http://paste.lisp.org/+N5E |

Channel: | #haskell |

Paste contents: |

in Yet Another Haskell Tutorial Chapter 9: Monads, page 124 a discussion of the Monad laws, Law 3 has this example: law3a = do x <- f do g <- x h y law3b = do y <- do x <- f g x h y I'm confused about law3a above, specifically where y is coming from. Should it be something like this: law3a = do x <- f do y <- g x h y

Annotations for this paste:

Annotation number 1: | re: YAHT monad laws |

Pasted by: | dino- |

When: | 10 years, 2 weeks ago |

Share: | Tweet this! | http://paste.lisp.org/+N5E/1 |

Paste contents: |

Yes, it should look like this: law3a = do x <- f do y <- g x h y I edited this entry to be correct in the YAHT Wikibook here: http://en.wikibooks.org/wiki/Haskell/YAHT/Monads#Law_3