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Postgresql GROUP_CONCAT equivalent?
...eturns 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 array_agg (anyelement)
(
sfunc = array_append,
stype = anyarray,
initcond = '{}'
);
(paraphrased from the...
View.setPadding accepts only in px, is there anyway to setPadding in dp?
...e these lines in a custom listview adapter. Is there any way I can do this if I can't call getResources()?
– Mike Baxter
Oct 2 '13 at 8:51
1
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sed error: “invalid reference \1 on `s' command's RHS”
...
Attention, if you use -r you don't have to escape the parentheses.
– qräbnö
Jan 13 '18 at 12:52
add a comment...
Spring 3 MVC accessing HttpRequest from controller
...
Spring MVC will give you the HttpRequest if you just add it to your controller method signature:
For instance:
/**
* Generate a PDF report...
*/
@RequestMapping(value = "/report/{objectId}", method = RequestMethod.GET)
public @ResponseBody void generateReport(
...
sbt-assembly: deduplication found error
...ependencies += "org.apache.spark" %% "spark-core" % "1.1.0" % "provided"
If needed, read more at
https://github.com/sbt/sbt-assembly#excluding-jars-and-files
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Difference between JOIN and INNER JOIN
...onally equivalent, but INNER JOIN can be a bit clearer to read, especially if the query has other join types (i.e. LEFT or RIGHT or CROSS) included in it.
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Add list to set?
...t each individual element every time you perform these operations. The specific algorithms used are explained in the Wikipedia article. Pythons hashing algorithms are explained on effbot.org and pythons __hash__ function in the python reference.
Some facts:
Set elements as well as dictionary keys...
Network usage top/htop on Linux
...ocess.
NetHogs does not rely on a special kernel module to be loaded. If there's suddenly a lot of network traffic, you can fire up NetHogs and immediately see which PID is causing this. This makes it easy to identify programs that have gone wild and are suddenly taking up your bandwidth.
...
What are the differences between .so and .dylib on osx?
...-dynamiclib flag to the compiler. (-fPIC is the default and needn't be specified.)
Loadable modules are called "bundles" in Mach-O speak. They have the file type MH_BUNDLE. They can carry any extension; the extension .bundle is recommended by Apple, but most ported software uses .so for the sake of...
Java Replacing multiple different substring in a string at once (or in the most efficient way)
I need to replace many different sub-string in a string in the most efficient way.
is there another way other then the brute force way of replacing each field using string.replace ?
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