What is an iterable and an iterator

OHIOLee answered on October 13, 2021 Popularity 9/10 Helpfulness 2/10

answer What is an iterable and an iterator

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What is an iterable and an iterator

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An iterable is any data structure that lets us access its elements.
Some built in examples are: strings, arrays, maps and sets.

An iterator is an object that has the ability to access items 
from its collection one at a time and keep track of the current position.

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Source: Grepper

Tags: iterable iterator whatever

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Contributed on Jun 13 2022

OHIOLee

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<?php
class myIterator implements Iterator {
    private $position = 0;
    private $array = array(
        "firstelement",
        "secondelement",
        "lastelement",
    );  

    public function __construct() {
        $this->position = 0;
    }

    public function rewind() {
        var_dump(__METHOD__);
        $this->position = 0;
    }

    public function current() {
        var_dump(__METHOD__);
        return $this->array[$this->position];
    }

    public function key() {
        var_dump(__METHOD__);
        return $this->position;
    }

    public function next() {
        var_dump(__METHOD__);
        ++$this->position;
    }

    public function valid() {
        var_dump(__METHOD__);
        return isset($this->array[$this->position]);
    }
}

$it = new myIterator;

foreach($it as $key => $value) {
    var_dump($key, $value);
    echo "\n";
}
?>

Popularity 10/10 Helpfulness 1/10 Language php

Source: www.php.net

Tags: iterator iterato

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Contributed on Oct 13 2021

Impossible Iguana

0 Answers Avg Quality 2/10

What is an iterable and an iterator

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