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Retrieving the last record in each group - MySQL
There is a table messages that contains data as shown below:
27 Answers
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What is the maven-shade-plugin used for, and why would you want to relocate Java packages?
I found the maven-shade-plugin being used in someone's pom.xml. I've never used maven-shade-plugin before (and I'm a Maven n00b) so I tried to understand the reason for using this and what it does.
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Using Java with Nvidia GPUs (CUDA)
I'm working on a business project that is done in Java, and it needs huge computation power to compute business markets. Simple math, but with huge amount of data.
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Increase font size chrome console
How can i increase the font-size in the chrome console?
15 Answers
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Postgresql GROUP_CONCAT equivalent?
...ly):
SELECT id_field, array_agg(value_field1), array_agg(value_field2)
FROM data_table
GROUP BY id_field
array_agg returns an array, but you can CAST that to text and edit as needed (see clarifications, below).
Prior to version 8.4, you have to define it yourself prior to use:
CREATE AGGREGATE ...
Store a closure as a variable in Swift
... block's input and output, store one of those blocks that's passed in to a method, then use that block later:
7 Answers
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Enabling ProGuard in Eclipse for Android
The new documentation on ProGuard for Android says to add a line to the default.properties file in the project home directory. However, on opening this file, I read at the top:
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How to install Java SDK on CentOS?
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The following command will return a list of all packages directly related to Java. They will be in the format of java-<version>.
$ yum search java | grep 'java-'
If there are no available packages, then you may need to download a ne...
Python str vs unicode types
Working with Python 2.7, I'm wondering what real advantage there is in using the type unicode instead of str , as both of them seem to be able to hold Unicode strings. Is there any special reason apart from being able to set Unicode codes in unicode strings using the escape char \ ?:
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What is the difference between _tmain() and main() in C++?
If I run my C++ application with the following main() method everything is OK:
5 Answers
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