Added seq method.

[mmoreram]

Executes each row of an array sequentially. Returns an array of each result.

This PR is not tested yet.

seq([
    $mysql->createTable(),
    $mysql->addElement(),
    $mysql->findElement()
])
->then(array $results) {
    $result[2]->getId();
});

[WyriHaximus]

seq([
    $mysql->createTable(),
    $mysql->addElement(),
    $musql->findElement()
])
->then(array $results) {
    $result[2]->getId();
});

Running that code will execute all 3 operations at the same time and not in sequence. Chaining them this way will execute them in sequence:

$mysql->createTable()->then(function () {
    return $mysql->addElement();
})->then(function () {
    return $musql->findElement();
})->then(array $results) {
    $result[2]->getId();
});

[mmoreram]

Chaining them is what this method does internally. Am I missing something?

[WyriHaximus]

You're chaining the outcome in this method, not the execution. The moment you start an operation it will immediately start doing what you tell it to do. The promise is only a placeholder for the outcome of that operation.

[mmoreram]

Totally right :=(

[WyriHaximus]

The idea itself isn't perse bad FYI ;)

[markuszeller]

Is it correct having $mysql and $musql?

[mmoreram]

@markuszeller fixed. It was a typo

[WyriHaximus]

@markuszeller @mmoreram and I kept it in because it didn't matter for the example you where making :D