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iterate() method

Syntax

$iterable = function () {
    yield 1;
    yield 2;
    // ...
};

use Symfony\Component\Console\Helper\ProgressBar;

$progressBar = new ProgressBar($output);

foreach ($progressBar->iterate($iterable) as $value) {
    // ... do some work
}

Non countable variable

foreach ($progressBar->iterate($iterable, 100) as $value) {
    // ... do some work
}