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ActiveLibrary[Utility & Helpers](/categories/utility)

laiz/laiz-monad
===============

Functional and Monad Utility

v0.3.2(9y ago)11551MITPHPPHP >=5.6.0

Since Dec 29Pushed 9y ago1 watchersCompare

[ Source](https://github.com/nishimura/laiz-monad)[ Packagist](https://packagist.org/packages/laiz/laiz-monad)[ Docs](https://github.com/nishimura/laiz-monad)[ RSS](/packages/laiz-laiz-monad/feed)WikiDiscussions master Synced 4w ago

READMEChangelogDependencies (2)Versions (12)Used By (1)

Laiz Monad
==========

[](#laiz-monad)

[![Build Status](https://camo.githubusercontent.com/e79ba4a657c045fb35a2838232f7d7e1e4e9692f38c899ac568f316796dd9612/68747470733a2f2f7472617669732d63692e6f72672f6e697368696d7572612f6c61697a2d6d6f6e61642e7376673f6272616e63683d6d6173746572)](https://travis-ci.org/nishimura/laiz-monad)[![Coverage Status](https://camo.githubusercontent.com/1426fd66a5606500be6e4886a9de3d840271d2f53b5d0d60d9db869b10700a90/68747470733a2f2f636f766572616c6c732e696f2f7265706f732f6769746875622f6e697368696d7572612f6c61697a2d6d6f6e61642f62616467652e7376673f6272616e63683d6d6173746572)](https://coveralls.io/github/nishimura/laiz-monad?branch=master)[![Code Climate](https://camo.githubusercontent.com/c41eb22d85046191925a542317eeb26f1a7657f8b1a57cd7ac1e97cac0dd6217/68747470733a2f2f636f6465636c696d6174652e636f6d2f6769746875622f6e697368696d7572612f6c61697a2d6d6f6e61642f6261646765732f6770612e737667)](https://codeclimate.com/github/nishimura/laiz-monad)

[![Latest Stable Version](https://camo.githubusercontent.com/04a3243aae5fdfe47e261f3e7cd78351cca6a4038046b3b47571fe2aa8c599a4/68747470733a2f2f706f7365722e707567782e6f72672f6c61697a2f6c61697a2d6d6f6e61642f762f737461626c65)](https://packagist.org/packages/laiz/laiz-monad)[![License](https://camo.githubusercontent.com/8c82e29117377663981964313792a65a6df9e7dc43255ac866c2a7b7e5d9023d/68747470733a2f2f706f7365722e707567782e6f72672f6c61697a2f6c61697a2d6d6f6e61642f6c6963656e7365)](LICENSE)

Curried Function
----------------

[](#curried-function)

```
require 'vendor/autoload.php';

use function Laiz\Func\f;

$f = f(function($a, $b, $c){
    return $a + $b + $c;
});
$f1 = $f(5);
$f2 = $f1(8);
var_dump($f2(200));
// 213

$f3 = $f1(9);
var_dump([$f2(200), $f3(200)]);
// [213, 214]

var_dump($f(1,2,3));
// 6
```

Maybe Monad
-----------

[](#maybe-monad)

```
require 'vendor/autoload.php';

use function Laiz\Func\f;
use function Laiz\Func\Maybe\Just;
use function Laiz\Func\Maybe\Nothing;

$a = Just(3);
$f = f(function($limit, $a){
    return $limit > $a ? Just($a) : Nothing();
});
$f2 = $f(2);
$f4 = $f(4);

var_dump($a->bind($f2));
// Nothing
var_dump($a->bind($f4));
// Just 3
```

Monoid, MonadPlus
-----------------

[](#monoid-monadplus)

```
require 'vendor/autoload.php';

use function Laiz\Func\Monad\ret;
use function Laiz\Func\Maybe\Just;

$monad = ret("Foo");
var_dump($monad->mappend([]));
// ['Foo']
var_dump($monad->mappend("Bar"));
// 'FooBar'
var_dump($monad->mappend(Just("Baz")));
// Just 'FooBaz'
var_dump($monad->mplus(Just("Baz")));
// Just 'Foo'
```

FizzBuzz
--------

[](#fizzbuzz)

```
require 'vendor/autoload.php';

use function Laiz\Func\f;
use function Laiz\Func\Functor\fmap;
use function Laiz\Func\Functor\fconst;
use function Laiz\Func\Monoid\mappend;
use function Laiz\Func\MonadZero\guard;
use function Laiz\Func\Maybe\fromMaybe;

// (integer d, Functor s, MonadPlus s) => d -> a -> d -> s a
function calc(...$args){
    return f(function($d, $s, $n){
        return fconst($s, guard($n % $d === 0));
    }, ...$args);
}

$fizzbuzz = fromMaybe()->ap(mappend(calc(3, "Fizz"), calc(5, "Buzz")));

function pr(...$args){
    return f(function($a){
        echo $a, "\n";
        return $a;
    }, ...$args);
}
$ret = fmap(pr()->compose($fizzbuzz), range(1, 100));
```

###  Health Score

26

—

LowBetter than 41% of packages

Maintenance20

Infrequent updates — may be unmaintained

Popularity12

Limited adoption so far

Community9

Small or concentrated contributor base

Maturity55

Maturing project, gaining track record

 Bus Factor1

Top contributor holds 100% of commits — single point of failure

How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window.

**Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores.

**Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement.

**Maturity (30%)** — Project age, version count, PHP version support, and release stability.

###  Release Activity

Cadence

Every ~19 days

Recently: every ~42 days

Total

11

Last Release

3641d ago

PHP version history (2 changes)v0.1.0PHP >=5.4.0

v0.2.0PHP >=5.6.0

### Community

Maintainers

![](https://www.gravatar.com/avatar/d24d51f0161c08e350b46433c98c21ff80d2cc5f22f5648f83a1aafd86bc3f76?d=identicon)[nishimura](/maintainers/nishimura)

---

Top Contributors

[![nishimura](https://avatars.githubusercontent.com/u/146196?v=4)](https://github.com/nishimura "nishimura (69 commits)")

---

Tags

functionalmonad

###  Code Quality

TestsPHPUnit

### Embed Badge

![Health badge](/badges/laiz-laiz-monad/health.svg)

```
[![Health](https://phpackages.com/badges/laiz-laiz-monad/health.svg)](https://phpackages.com/packages/laiz-laiz-monad)
```

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