geophf / 1haskelladay

1 Haskell A Day exercises

This project provides a git support for 1HaskellADay's exercises (see @1HaskellADay and the hashtag #1HaskellADay)

Getting started

• Find an exercise in the exercises folder (there is one in the Exercise.hs file of each "leaf/date folder"). For example, the first one is in HAD\Y2014\M02\D24\Exercise.hs
• Do it.
• At the root of the project, run ghci.
• check your answer with check. For example here: check =<< date 2014 2 24
• compare your answer with the proposed one (in the Solution.hs file)

The 1had executable

If you install 1HaskellADay with cabal (cabal configure and then cabal install), you can use the 1had executable for an easier access to the tests and exercices.

1haskelladay's Issues

build-depends on versions of packages incompatible with modern base

~/prog$ git clone https://github.com/geophf/1HaskellADay.git
Cloning into '1HaskellADay'...
remote: Counting objects: 1902, done.
remote: Compressing objects: 100% (109/109), done.
remote: Total 1902 (delta 60), reused 0 (delta 0), pack-reused 1773
Receiving objects: 100% (1902/1902), 462.71 KiB | 0 bytes/s, done.
Resolving deltas: 100% (759/759), done.
Checking connectivity... done.
~/prog$ cd 1HaskellADay/
~/prog/1HaskellADay$ cabal sandbox init
Writing a default package environment file to
/home/username/prog/1HaskellADay/cabal.sandbox.config
Creating a new sandbox at /home/username/prog/1HaskellADay/.cabal-sandbox
~/prog/1HaskellADay$ cabal repl
Package has never been configured. Configuring with default flags. If this
fails, please run configure manually.
Resolving dependencies...
Warning: solver failed to find a solution:
Could not resolve dependencies:
trying: HAD-0.3.0.1 (user goal)
next goal: process (dependency of HAD-0.3.0.1)
rejecting: process-1.4.2.0/installed-1.4... (conflict: HAD => process==1.1.*)
Dependency tree exhaustively searched.
Trying configure anyway.
Configuring HAD-0.3.0.1...
cabal: Encountered missing dependencies:
QuickCheck >=2.6,
doctest ==0.9.*,
filepath ==1.3.*,
process ==1.1.*,
time ==1.4.*
~/prog/1HaskellADay$ cabal install --dependencies-only
Resolving dependencies...
cabal: Could not resolve dependencies:
trying: base-4.9.0.0/installed-4.9... (dependency of HAD-0.3.0.1)
next goal: process (dependency of HAD-0.3.0.1)
rejecting: process-1.4.2.0/installed-1.4..., process-1.4.2.0, process-1.4.1.0,
process-1.4.0.0, process-1.3.0.0, process-1.2.3.0, process-1.2.2.0,
process-1.2.1.0, process-1.2.0.0 (conflict: HAD => process==1.1.*)
rejecting: process-1.1.0.2 (conflict: base==4.9.0.0/installed-4.9..., process
=> base>=4 && <4.7 || >=3 && <4)
trying: process-1.1.0.1
next goal: directory (dependency of process-1.1.0.1)
rejecting: directory-1.2.6.2/installed-1.2..., directory-1.2.7.0,
directory-1.2.6.3, directory-1.2.6.2, directory-1.2.5.1, directory-1.2.5.0,
directory-1.2.4.0, directory-1.2.3.1, directory-1.2.3.0, directory-1.2.2.1,
directory-1.2.2.0, directory-1.2.1.0, directory-1.2.0.1, directory-1.2.0.0
(conflict: process => directory>=1.0 && <1.2)
rejecting: directory-1.1.0.2 (conflict: base==4.9.0.0/installed-4.9...,
directory => base>=4.4 && <4.6)
rejecting: directory-1.1.0.1 (conflict: base==4.9.0.0/installed-4.9...,
directory => base>=4.2 && <4.5)
rejecting: directory-1.1.0.0, directory-1.0.1.2 (conflict:
base==4.9.0.0/installed-4.9..., directory => base>=4.2 && <4.4)
rejecting: directory-1.0.1.1, directory-1.0.1.0 (conflict:
base==4.9.0.0/installed-4.9..., directory => base>=4.1 && <4.3)
rejecting: directory-1.0.0.3, directory-1.0.0.0 (conflict:
base==4.9.0.0/installed-4.9..., directory => base<4.3)
rejecting: directory-1.2.6.1 (conflict: process => directory>=1.0 && <1.2)
Dependency tree exhaustively searched.

Note: when using a sandbox, all packages are required to have consistent
dependencies. Try reinstalling/unregistering the offending packages or
recreating the sandbox.
~/prog/1HaskellADay$