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Informations about the package iterate
Iterate
PHP classes and interfaces to iterate \Iterators by a scenario or to perform a
regular expression match on iterator elements by a scenario.
A Scenario is a class that implements the ScenarioInterface or extends either
BaseScenario or BaseRegexScenario abstract class. It receives an Iterator
instance and executes the logic in certain moments of the iteration process -
for example, while regex matching is performed - when some pattern matched a
subject, or none matched, or before/after performing a search, etc.
Think of it as of array_walk()
for iterators or iterator_apply(),
but instead of a single callback you provide an object (Scenario) with several
methods. And you can use these Scenarios as plugins.
Iterator is simply any object implementing the \Iterator
interface.
The main class, which runs the process, is Iterate. It just needs to be
instantiated and invoked with an iterator and a scenario objects.
Best suited for use as a Composer library.
Requirements
- PHP ≥ 7.1
Installation
To add this library to your Composer project:
Usage
There are 2 base scenarios included:
- The very basic one to execute some logic on each element of the iterator unconditionally.
- And the regex based one, which performs a regular expression match (using one or more patterns) on iterator elements (casted to strings), and allows to execute different logic depending on what pattern matched or if no patterns matched.
Example
Assuming there is an array of strings, $array. Iterate over it,
convert all empty strings to 0 (zero), print all strings containing "PHP" and
simply count all other elements.
First, create a scenario class:
And then:
