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Example code of xcgpseud/hasphp

Informations about the package hasphp

HasPHP

Type-strict iterable lists with functional functionality provided to them.

There are 2 primary ideas behind this library.

  1. To provide a way of specifying a type to elements of an array within PHP and forcing adherence to this.

  2. To provide a series of functional implementations to an iterable type within PHP.

With HasPHP, these have been combined.

Installation

With composer installed, in your project type:

composer require xcgpseud/hasphp

Usage

HasPhp will ensure that any items in the initial array are the same type as the one specified. When using Objects - it will ensure that they are all the same type as the first in the array.

Here are a few usage examples:

To get all odd numbers between 0 and 200, multiply them by 2 and retrieve the sum of said numbers

To get all people above the age of 18

Functions such as map and filter return an IterList so you can chain more functions on to the end. In order to retrieve the array, use ->get()

All functions

Signature is in order of the array within the List -> params -> returns as opposed to Haskell's.

i.e. Haskell's filter is (a -> bool) -> [a] -> [a] because it's called like so: filter (even) [5, 1, 2, 7] whereas Hasphp's is [a] -> (a -> bool) -> [a] because we define the list prior to the function.

Function Signature Strings Ints Objects Description
Abs [a] -> [a] No Yes No Return an IterList containing absolute values.
All [a] -> (a -> bool) -> bool Yes Yes Yes Returns true if the predicate applies to every element.
Any [a] -> (a -> bool) -> bool Yes Yes Yes Returns true if the predicate applies to any of the elements.
Average [a] -> a No Yes No Returns the average of all values.
Break_ [a] -> (a -> bool) -> ([a], [a]) Yes Yes Yes Returns a tuple of all elements until the first one that matches the predicate, followed by the remaining elements.
Delete [a] -> a -> [a] Yes Yes Yes Returns an IterList with the first occurrence of the passed value removed.
Drop [a] -> Int -> [a] Yes Yes Yes Returns the suffix of xs after the first n elements.
DropWhile [a] -> (a -> bool) -> [a] Yes Yes Yes Returns the suffix of xs after the predicate's first failure.
Elem [a] -> a -> bool Yes Yes Yes Returns true if the IterList contains the element; else false.
Filter [a] -> (a -> bool) -> [a] Yes Yes Yes Returns and IterList with all of the elements that match the predicate.
Foldl [b] -> (a -> b -> a) -> a -> a Yes Yes Yes Left fold over the IterList to reduce it to one element with a starting value.
Foldr [a] -> (a -> b -> b) -> b -> b Yes Yes Yes Right fold over the IterList to reduce it to one element with a starting value.
Foldl1 [a] -> (a -> a -> a) -> a Yes Yes Yes Left fold over the IterList to reduce it to one element.
Foldr1 [a] -> (a -> a -> a) -> a Yes Yes Yes Right fold over the IterList to reduce it to one element.
Group [a] -> [[a]] Yes Yes Yes Split the IterList into a Many List of IterLists of equal, adjacent elements.
GroupBy [a] -> (a -> a -> bool) -> [[a]] Yes Yes Yes Split the IterList into a Many List of IterLists of equal, adjacent elements, with a provided equality predicate.
Head [a] -> a Yes Yes Yes Returns the first element of the IterList.
Init [a] -> [a] Yes Yes Yes Returns the IterList without its last element.
Inits [a] -> [[a]] Yes Yes Yes Returns a Many List of initial segments of its argument IterList, shortest first.
Intercalate [a] -> [[a]] -> [a] Yes Yes Yes Returns a Many List with the method receiver List inserted into the IterList at each step.
Intersperse [a] -> a -> [a] Yes Yes Yes Returns the IterList with the provided element between each element.
Last [a] -> a Yes Yes Yes Returns the last element of the IterList.
Length [a] -> int Yes Yes Yes Returns the number of elements in the IterList.
Map [a] -> (a -> bool) -> [a] Yes Yes Yes Returns an IterList with the passed function applied to every element.
Maximum [a] -> a Yes Yes No Returns the maximum element from the IterList.
MaximumBy [a] -> (a -> a -> a) -> a Yes Yes Yes Returns the maximum element from the IterList according to the predicate.
Minimum [a] -> a Yes Yes No Returns the minimum element from the IterList.
MinimumBy [a] -> (a -> a -> a) -> a Yes Yes Yes Returns the minimum element from the IterList according to the predicate.
Nub [a] -> [a] Yes Yes Yes Returns the IterList with duplicates removed.
Null [a] -> bool Yes Yes Yes Returns true if the IterList is empty; otherwise false.
Sum [a] -> a No Yes No Returns the sum of all elements.
Tail [a] -> [a] Yes Yes Yes Returns the IterList without its first element.
Take [a] -> int -> [a] Yes Yes Yes Returns an IterList with only the first n elements, where n is specified.
TakeWhile [a] -> (a -> bool) -> [a] Yes Yes Yes Returns an IterList with all elements until the predicate fails.

Contributing

There is currently no documentation for HasPHP but keep an eye open as I plan to add this soon. This will change the contributing guidelines.

All versions of hasphp with dependencies

PHP Build Version
Package Version
Requires phpunit/phpunit Version ^8.5
myclabs/php-enum Version ^1.7
fzaninotto/faker Version ^1.9
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