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Which Java Collection should I use?
...dList uses more memory per element...ArrayList never releases memory. That means that if you have a list that sometimes grows to a huge size but usually is small then an ArrayList will give worse memory performance. The memory overhead of the List itself is usually (although not always) small compar...
HTTP GET with request body
...for GET, however, are restricted such that a body, if any, has no semantic meaning to the request. The requirements on parsing are separate from the requirements on method semantics.
So, yes, you can send a body with GET, and no, it is never useful to do so.
This is part of the layered design of HTT...
How do I determine whether an array contains a particular value in Java?
...[]>', and not a 'list<int>'. It just contains one single element. Meaning the Contains doesn't work since it just has one element; the int array.
– Nyerguds
Nov 13 '10 at 13:15
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What is cardinality in MySQL?
...avigating less branches to get data.
Therefore higher cordinality values mean:
better performance of read-queries;
bigger database size;
worse performance of write-queries, because hidden index data is being updated.
sh...
Python str vs unicode types
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unicode is meant to handle text. Text is a sequence of code points which may be bigger than a single byte. Text can be encoded in a specific encoding to represent the text as raw bytes(e.g. utf-8, latin-1...).
Note that unicode is not ...
How can I create a copy of an object in Python?
...lds of the new object, the old object should not be affected by that.
You mean a mutable object then.
In Python 3, lists get a copy method (in 2, you'd use a slice to make a copy):
>>> a_list = list('abc')
>>> a_copy_of_a_list = a_list.copy()
>>> a_copy_of_a_list is a_lis...
Grouped LIMIT in PostgreSQL: show the first N rows for each group?
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That's exactly what I mean: 8.3 neither had CTEs nor windowing functions. So the first solution won't work on 8.3
– a_horse_with_no_name
Dec 7 '12 at 21:05
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efficient way to implement paging
...will be using exclusively the index to create the data access window; this means, if you need some filtering, the filtering should be (or must be) in the Entity listing (where the row is created) and some indexes should be created as well to keep up the good performance.
Now, whats better?
If you ...
Custom toast on Android: a simple example
...check for that TextView should be there, just to be safe and by a check, I mean a null check or a type check. Just in case, google decides to change the id or view for showing text in Toast class. Anyway... +1
– DroidDev
May 24 '15 at 6:07
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Is it possible to set the stacking order of pseudo-elements below their parent element? [duplicate]
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I am not sure what you mean by #parent and #pseudo-parent, do you mind to show me a jsFiddle? or any example, thanks anyway.
– adardesign
Jan 31 '12 at 14:49
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