How to understand these BPE commands?

Question

'''subword-nmt learn-bpe -s {num_operations} < {train_file} > {codes_file}'''

'''subword-nmt apply-bpe -c {codes_file} < {test_file} > {out_file}'''

These two commands are taken from the BPE github. I'm trying to run it in Google Collab but I do not understand the command variables. The brackets in particular are throwing me off. Do I type my full training file's name in like {"this_is_my_training.train"}? The ">" and "<" are also throwing me off. Are these Bash commands?

Answer 1

You could pass a Closure to the load method to lazy load them.

$thread = Thread::find(1);

$thread->load(['messages' => function ($message) {
    return $message->where('type_id', 3);
}]);

return new JsonResponse($thread);

or do the same using the with method.

$thread = Thread::with(['messages' => function ($message) {
    return $message->where('type_id', 3);
}])->find(1);

return new JsonResponse($thread);

---

Short-hand Closure (PHP version >= 7.4)

$thread = Thread::with(['messages' => fn ($m) => $m->where('type_id', 3)])->find(1);

$thread = Thread::find(1);

$thread->load(['messages' => fn ($m) => $m->where('type_id', 3)]);

---

Separate relationship

# Thread model
// or whatever name makes sense in your application
public function active_messages() 
{
    return $this->hasMany(Message::class)->where('type_id', 3);
}

$thread = Thread::with('active_messages')->find(1);

$thread = Thread::find(1);

$thread->load('active_messages');

---

In terms of queries, all options are the same.

Answer 2

You can pass a function in which you will perform some check before eager loader message which are related to the thread like this

Thread::with(["messages" => function($query){
    $query->where("type_id", 3);
})->find(1);