nspl\op

Class nspl\op provides functions that perform standard PHP operations and can be passed as callbacks to higher-order functions. Mimics Python's operator module. For example:

use const nspl\op\sum;
use function nspl\a\reduce;

assert(6 === reduce(sum, [1, 2, 3]));

Callbacks

The module provides the following operations both as functions and callbacks. See an example below.

Function	Operation
sum	+
sub	-
mul	*
div	/
mod	%
inc	++
dec	--
neg	-
band	&
bxor	^
bor	|
bnot	~
lshift	<<
rshift	>>
lt	<
le	<=
eq	==
idnt	===
ne	!=
nidnt	!==
ge	>
gt	>=
and_	&&
or_	||
xor_	xor
not	!
concat	.
int	(int)
bool	(bool)
float	(float)
str	(string)
array_	(array)
object	(object)

itemGetter($key)

Returns a function that returns key value for a given array

use function nspl\op\itemGetter;
use function nspl\a\map;

assert([2, 5, 8] === map(itemGetter(1), [[1, 2, 3], [4, 5, 6], [7, 8, 9]]));

propertyGetter($property)

Returns a function that returns property value for a given object

$userIds = map(propertyGetter('id'), $users);

methodCaller($method, array $args = array())

Returns a function that returns method result for a given object on predefined arguments

$userIds = map(methodCaller('getId'), $users);

Check more \nspl\op examples here.