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What way should I take four values and order them in descending/ascending ordering keeping their related Key?

I have four players. Each player has a score. Their score is contained in a TextView and their name in another TextView. At the minute I have a HashMap that generates identifiable keys e.g. (player 1, player 2) and retrieves their related score as a value.

I need to sort the scores in both descending and ascending order(depending on if a Gametype is one or another.) but we will use just descending for this example.

I found a way to sort the values into a inside the HashMap I mentioned previously. I thought I would just be able to print this HashMap out in order but of course I soon learned that that you use the get methond in the HashMap and thet retrieves the value of the key provided. To solve this problem I googled and seen I can change it into an Array and iterate through it that way:

 private void populateViews() {      for (int i = 0; i < numOfPlayers; i++) {         tv_positions[i].setText(String.valueOf(finishingPositions.keySet().toArray()[i]));     }  }

This feels like a round about way. What way should I be doing this?

Cache and deadlock related database errors

We have a module that performs fairly complex operations underneath the hood. Sometimes the processes exit with database related errors, since there are no exceptions thrown by Drupal core we can’t catch them and the operation gets hosed. Here are few example logs

Cache issue

Drupal\Core\Database\IntegrityConstraintViolationException: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry ‘foldershare_scheduledtask:228’ for key ‘PRIMARY’: INSERT INTO {cachetags} (invalidations, tag) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1); Array ( [:db_insert_placeholder_0] => 1 [:db_insert_placeholder_1] => foldershare_scheduledtask:228 ) in Drupal\Core\Database\Connection->handleQueryException() (line 683 of /var/www/html/core/lib/Drupal/Core/Database/Connection.php).

Deadlock issue

Drupal\Core\Database\DatabaseExceptionWrapper: SQLSTATE[40001]: Serialization failure: 1213 Deadlock found when trying to get lock; try restarting transaction: INSERT INTO {cache_config} (cid, expire, created, tags, checksum, data, serialized) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6) ON DUPLICATE KEY UPDATE cid = VALUES(cid), expire = VALUES(expire), created = VALUES(created), tags = VALUES(tags), checksum = VALUES(checksum), data = VALUES(data), serialized = VALUES(serialized); Array ( [:db_insert_placeholder_0] => last_write_timestamp_cache_config [:db_insert_placeholder_1] => -1 [:db_insert_placeholder_2] => 1553130698.381 [:db_insert_placeholder_3] => [:db_insert_placeholder_4] => 0 [:db_insert_placeholder_5] => d:1553130698.382; [:db_insert_placeholder_6] => 1 ) in Drupal\Core\Cache\ChainedFastBackend->markAsOutdated() (line 306 of /var/www/html/core/lib/Drupal/Core/Cache/ChainedFastBackend.php).

We can see these issues on develop sites with sqlite database and also on test sites with mysql database.

Any ideas on how to deal with these, without disabling entity cache entirely.

Confusion related to definition of a derivative at a point in its domain of definition.

I have just completed relations and functions and now I am studying limits and differentiability.As a beginner help me to clear my doubts.

My textbook defines limits in this way:-

                   $  \lim_{ x\ to a } = \l $

I grasp it in this way that as x approaches to take value ‘a’ then function tends to become ‘l’. I know that as x tends to become ‘a’ from both sides left hand side as well as right hand side then function also tends to become ‘l’ from both sides. I also know that limit of a function may or may not be equal to the value of the function at that point in domain.

Now I have basically two confusions whether the algebra of limits is a law or a definition.I can verify the properties of algebra of limits by considering some real valued functions but I am unable to prove it.

My next doubt is related to definition of a derivative of a function at a point in its domain which is stated in my textbook in this way:-

   $  \lim_{h\to a} \frac{f(a+h)-f(a)}{h}$

Now I know that as ‘h’ tends to become 0 then the expression after the limit has some finite limit but I can’t perceive it in the notion of limits. I know it’s geometric interpretation that this is the slope of the tangent to the curve at point ‘a’ .

I am very much confused that how I can interpret it in the way I do for limits. Please tell me if I am not able to convey my problem. Please edit it if there is any problem in math Jax.

Naruto Online Game Guides – Most Related Keywords Ranking First Page Google

Why are you selling this site?
I'm looking for urgent funding to other big projects I'm working on.

How is it monetized?
AdSense. But the niche is not AdSense friendly so it's not making much from Adsense

Does this site come with any social media accounts?
Yes, there is a Facebook account with 590 organic likes.

How much time does this site take to run?
Depends on how much time the buyer wants to spend. The site is about adding contents related to Naruto Online…

Naruto Online Game Guides – Most Related Keywords Ranking First Page Google

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Are personal information retention periods related to the UK borders/immigration different for EU and NON-EU citizens?

Is there any difference between the retention periods of personal information related to borders, immigration and customs for EU citizens and NON-EU/EEA/SCHENGEN citizens? This is vaguely discussed here, but way too vaguely!