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Why does PostgreSQL perform sequential scan on indexed column?
...current one- an index scan fetches one page at once. (A bitmap scan does a compromise between the two, you usually see that appearing in a plan for queries that aren't selective enough for an index scan, but still not so unselective as to merit a full table scan)
– araqnid
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Compiling C++11 with g++
I'm trying to update my C++ compiler to C++11.
I have searched a bit and I have come to the conclusion that I have to use the flag -std=c++0x or -std=gnu++0x , but I don't know many things about flags. Can anyone help me? (I'm using Ubuntu 12.04.)
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How should I copy Strings in Java?
...te anything in the String pool of the JVM. Only string litterals and those commited to the pool via intern() are in the pool.
– Snicolas
May 15 '12 at 20:12
3
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Using Moq to mock an asynchronous method for a unit test
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You're creating a task but never starting it, so it's never completing. However, don't just start the task - instead, change to using Task.FromResult<TResult> which will give you a task which has already completed:
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.Returns(Task.FromResult(new HttpResponseMessage(System.Net...
How do I drop table variables in SQL-Server? Should I even do this?
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When to use a key/value store such as Redis instead/along side of a SQL database?
...seem to figure out when it's time to use it in an application.
I would recommend you to read this tutorial which contains also use cases. Since redis is rather memory oriented it's really good for frequently updated real-time data, such as session store, state database, statistics, caching and its...
Difference between val() and text()
... matched elements:
.text()
The result is a string that contains
the combined text contents of all
matched elements. This method works on
both HTML and XML documents. Cannot be
used on input elements. For input
field text use the val attribute.
.val()
Get the content of the value...
How to create an exit message
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re. Mike Stone's comment, it sometimes looks as though Ruby was written by a team of people who had no communication with one another, doesn't it? (Still, it's so easy to program in it.)
– JellicleCat
Ma...