bool-extras: A fold function for Bool
The bool
function allows folding over boolean values.
This is comparable to the maybe
or either
functions
on their respective types.
The bool
function is a replacement for the build-in
if then else
-syntax. However, since it is a function, it
can be partially applied and passed around to higher order
functions, like so:
ghci> :m + Data.Bool.Extras ghci> let yesOrNo = bool "no" "yes" ghci> map yesOrNo [True, False, True] ["yes", "no", "yes"]
Note that the arguments to bool
are in the opposite order
of the if then else
-syntax; First the false value, then
the true value, and finally the boolean.
Downloads
- bool-extras-0.4.0.tar.gz [browse] (Cabal source package)
- Package description (as included in the package)
Maintainer's Corner
For package maintainers and hackage trustees
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Versions [RSS] | 0.2.0, 0.3.0, 0.4.0 |
---|---|
Dependencies | base (>=3 && <5) [details] |
License | BSD-3-Clause |
Author | Erik Hesselink, Jeroen Leeuwestein, Tom Lokhorst, Sebastiaan Visser |
Maintainer | Tom Lokhorst <tom@lokhorst.eu> |
Category | Data |
Home page | http://tom.lokhorst.eu/bool-extras |
Uploaded | by TomLokhorst at 2014-04-04T12:58:55Z |
Distributions | Debian:0.4.0, NixOS:0.4.0 |
Reverse Dependencies | 3 direct, 1 indirect [details] |
Downloads | 4403 total (18 in the last 30 days) |
Rating | (no votes yet) [estimated by Bayesian average] |
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Status | Docs available [build log] Successful builds reported [all 1 reports] |