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Example code of smoren/sequence

Informations about the package sequence

PHP Iterator-based sequences

Packagist PHP Version Support Scrutinizer Code Quality Coverage Status Build and test License: MIT

Python-like sequences with iterators for PHP.

How to install to your project

Quick Reference

Loops

Functionality Description Code Snippet
Range-based for Python-like range-based loop foreach(xrange($start, $size, $step) as $value)

Sequences

Class Description Code Snippet
Range Iterable arithmetic progression new Range($start, $size, $step)
Exponential Iterable geometric progression new Exponential($start, $size, $step)
DynamicSequence Callback-configurable sequence new DynamicSequence($start, $size, $nextValueGetter, $indexedValueGetter)

Data containers

Class Description Code Snippet
IndexedArray Python-like indexed list new IndexedArray($array)

Functions

Function Description Code Snippet
xrange Creates iterable range xrange($start, $size, $step)
map Maps iterable collections and returns IndexedArray of mapped values map($mapper, ...$collections)
filter Filters iterable collection and returning IndexedArray of filtered items filter($collection, $filter)
reduce Reduces an iterable collection reduce($collection, $reducer, $initialValue)

Usage

Loops

Range-based for

Unlike the PHP built-in function range(), xrange() does not create an array, but a Traversable object that takes up a small amount of memory, regardless of the number of elements in the sequence.

Sequences

Range

Iterable arithmetic progression.

For infinite sequence use $size = null.

Exponential

Iterable geometric progression.

For infinite sequence use $size = null.

Dynamic Sequence

Implementation of sequence configured with callables.

For infinite sequence use $size = null.

Data containers

Indexed Array

Python-like indexed list.

Its keys are always an unbroken sequence of natural numbers starting from zero.

It is also allowed to access array elements from the end with negative indices.

OutOfRangeException will be thrown when trying to access a non-existent index.

Functions

xrange

Creates iterable range.

Works like xrange() function in python2 or range() function in python3.

map

Maps iterable collection and creating IndexedArray of mapped values as a result.

filter

Filters iterable collection and returning IndexedArray of filtered items.

reduce

Reduces an iterable collection.

Unit testing

Standards

PHP Sequence conforms to the following standards:

License

PHP Sequence is licensed under the MIT License.

All versions of sequence with dependencies

PHP Build Version
Package Version
Requires php Version >=7.4
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