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What is the difference between a HashMap and a TreeMap? [duplicate]
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TreeMap is an example of a SortedMap, which means that the order of the keys can be sorted, and when iterating over the keys, you can expect that they will be in order.
HashMap on the other hand, makes no such guarantee. Therefore, when iterating over the keys of a HashMap, you can...
How to maintain a Unique List in Java?
... low) if iteration performance is important.
When iterating a HashSet the order of the yielded elements is undefined.
LinkedHashSet
Hash table and linked list implementation of the Set interface, with predictable iteration order. This implementation differs from HashSet in that it maintains a doub...
Android, canvas: How do I clear (delete contents of) a canvas (= bitmaps), living in a surfaceView?
In order to make a simple game, I used a template that draws a canvas with bitmaps like this:
18 Answers
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Comparison of Lucene Analyzers
...it's a job of Lemmatizer. You can check it here snowball.tartarus.org/demo.php
– Tho
Jan 7 '15 at 9:51
So where does T...
Can one do a for each loop in java in reverse order?
I need to run through a List in reverse order using Java.
13 Answers
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CSS3 Rotate Animation
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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T-SQL get SELECTed value of stored procedure
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How do I get this results in php?
– HagaHood
Jan 12 '17 at 14:33
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What is “function*” in JavaScript?
...tail on the EcmaScript working group wiki: http://wiki.ecmascript.org/doku.php?id=harmony:generators
The working group (TC-39) has general agreement that EcmaScript.next should have some kind of generator iterator proposal, but this is not final.
You shouldn't rely on this showing up without changes...
MySQL order by before group by
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Using an ORDER BY in a subquery is not the best solution to this problem.
The best solution to get the max(post_date) by author is to use a subquery to return the max date and then join that to your table on both the post_author an...
Possible to iterate backwards through a foreach?
...rrect method for this task. Plus, for as much as foreach is implemented in-order, the construct itself is built for expressing loops that are independent of element indexes and iteration order, which is particularly important in parallel programming. It is my opinion that iteration relying on order ...