OpenLock | A simple , extensible RFID door lock | Authentication library
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kandi X-RAY | OpenLock Summary
A simple, extensible RFID door lock
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QUESTION
I have just learned the BFS algorithm and I am trying to apply the BFS algorithm to solve the leetcode problem here Open the Lock
My algorithm works for some usecases and outputs a wrong answer for the others. Can anyone help me understand what I am missing?
Thanks in advance
...ANSWER
Answered 2020-Aug-17 at 01:18Not really sure what might be wrong with your algorithm, looks pretty OK to me, might be something small that needs to be fixed.
Almost the same method, except we'd be using three Sets to solve the problem in Java:
QUESTION
Leetcode introduced two BFS-Template, the second:
...ANSWER
Answered 2019-Apr-15 at 05:46For question:
does check root is regarded as step 0?
step = -1 is the appropriate initiation in python's implementation?
yes, we should use step = -1 here, because the first element in queue is 0000, it is not count in result, so we should decrease step to -1.
For question:
"In contrast, many implementation check
if next == target, return step +1at the current level' which mixed the terminating checking and stretch job."
It is a method to stop early, because we already know it will not pass the teminating check in recursion, so we just don't enter it, and prune it. It will decrease one recursion depth.
But as you said, in many situations, this implemenation is not recommended, because it will mixed the terminating checking and stretch job.
QUESTION
I am trying to solve a problem by editing a list that keeps track of closed and open lockers in a school, the code I got to is the following:
...ANSWER
Answered 2019-Apr-04 at 03:43Your code has a few other places where it can be simplified, but your real problem is here within the for loop:
QUESTION
I'm new to coroutines and I'm wondering if it's possible to switch from coroutineScope (GlobalScope) to UI scope for the code below. My problem is that the steps inside the coroutine launch body must be executed in a worker thread, otherwise the listener notification must be executed in the ui thread in order to avoid to call runOnUiThread in my activity code.
...ANSWER
Answered 2019-Mar-15 at 10:36You may use withContext(Dispatchers.UI) {..} function to execute a part of your code with the other Coroutine Dispatcher.
kotlinx.coroutines.android contains the definition of the Dispatchers.UI function and it integrates correctly with Android UI.
Using explicit Dispatcher in your code is quite error-prone. Instead, I would recommend designing the code with fewer explicit requirements.
I would wrote something like that:
QUESTION
I'm really new to Java and I'm having issues with a program required for my Java class. I need to simulate a lock and implement methods that change combination, check the number on top etc.
Well, I think there's an issue with my openLock() method or alterLockCombination() method. My program will correctly open the lock with default combination (0,0,0) but when I try and change the combination it won't work properly and only the default combination will unlock the lock.
Where are my errors here?
...ANSWER
Answered 2018-Dec-05 at 08:32The problem is that you are creating a new Lock() each time menu() is called.
So, the modified combination will be immediately replaced by the default one since menu() gets called just after that, and the lock replaced by a new Lock instance :
QUESTION
public class ComputerHub : Hub
{
private readonly DbContext _db;
public ComputerHub(DbContext db)
{
_db = db;
}
public Task OpenLock(string connectionId)
{
return Clients.Client(connectionId).SendAsync("OpenLock");
}
...
}
ANSWER
Answered 2018-Jun-13 at 13:03You don't seem to understand how this works. To simply answer your question, to inject the class directly, it simply needs to be registered with the service collection, like any other dependency:
QUESTION
openLock is not printing open, it keeps showing close. please whats the problem with my code. thank you
...ANSWER
Answered 2017-Jan-15 at 18:44You set self.code 2 times in the constructor (2. time = []).
I also added a flag open to save the state of the lock.
The check if print == "open" does not work as you might expect it.
Also there is no need to save self.enteredCombination= enteredCombination, as you only need it inside the method.
If combination is an int, there is no need to use remove and append.
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You can use OpenLock like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the OpenLock component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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