The functional from leonardorifeli

functional's Introduction

Functional

Motivation

I did create this project to explore Functional Programming.
This project doesn't use any loop!

Install

composer require sergiors/functional "dev-master"

How to use

use Sergiors\Functional as F;

$addFourNumbers = funciton ($a, $b, $c, $d) {
    return $a + $b + $c + $d;
};

$partialAddFourNumbers = F\partial($addFourNumbers);
$f = $partialAddFourNumbers(1, 2);
$g = $f(3);

echo $g(4); // => 10

You can hold native functions with Sergiors\Funcional\hold.

use Sergiors\Functional as F;

$implode = F\hold('implode', ',');
echo $implode(['a', 'b']); // => a,b

// something more complex
$pipe = F\pipe(
    F\hold('array_slice', F\_, 2),
    F\hold('array_map', function ($x) {
        return $x * 2;
    }),
    F\hold('implode', ',')
);

echo $pipe([10, 20, 30, 40, 50]); // => 60,80,100

Sergiors\Functional\_ is the placeholder for payload. If you don't set the placeholder, the payload will be last argument.

Collection

You can wrap an array with Sergiors\Functional\Collection to use fluent interface.

use Sergiors\Functional\Collection;

$ls1 = new Collection([1, 2, 3, 4, 5, 6]);

$ls2 = $ls1->filter(function ($x) {
    return $x > 2;
})->map(function ($x) {
    return $x + 1;
});

print_r($ls1->toArray()); // => [1, 2, 3, 4, 5, 6]
print_r($ls2->toArray()); // => [4, 5, 6, 7]

API

All functions are automatically applied partial application.

always()
append()
compose()
concat()
diff()
drop()
each()
equals()
filter()
flatten()
get()
getin()
gt()
gte()
has()
head()
hold()
id()
ifelse()
last()
lt()
lte()
map()
not()
partial()
pipe()
prop()
prepend()
reduce()
sort()
tail()
take()
takewhile()

Collection::concat()
Collection::filter()
Collection::map()
Collection::each()
Collection::prepend()
Collection::append()
Collection::reduce()
Collection::count()
Collection::getIterator()
Collection::toArray()