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SQL, Postgres OIDs, What are they and why are they useful?
... handy for tables where you don't have a primary key, have duplicate rows, etc. For example, if you have a table with two identical rows, and you want to delete the oldest of the two, you could do that using the oid column.
OIDs are implemented using 4-byte unsigned integers. They are not unique–...
PostgreSQL naming conventions
...table names vs. camel case, sequences, primary keys, constraints, indexes, etc...)
2 Answers
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Why would introducing useless MOV instructions speed up a tight loop in x86_64 assembly?
...instructions that are more RISC in behavior. Additionally there are out-of-order execution analyzers, branch predictors, Intel's "micro-ops fusion" that try to group instructions into larger batches of simultaneous work (kind of like the VLIW/Itanium titanic). There are even cache boundaries that co...
How to get different colored lines for different plots in a single figure?
... don't force a different color for each plot, all the plots share the same order of colors but, if we stretch a bit what "automatically" means, it can be done.
The OP wrote
[...] I have to identify each plot with a different color which should be automatically generated by [Matplotlib].
But...
String.format() to format double in java
...
Yes, Matt is right. %1, %2 and so on can be used to re-order the output based on the index of your input arguments. See this. You can omit the index and the default order will be assumed by the formatter.
– praneetloke
May 14 '16 at 16:06
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What is Ad Hoc Query?
...ot be determined prior to the moment the query is issued. It is created in order to get information when need arises and it consists of dynamically constructed SQL which is usually constructed by desktop-resident query tools.
Check: http://www.learn.geekinterview.com/data-warehouse/dw-basics/what-i...
Android - How To Override the “Back” button so it doesn't Finish() my Activity?
...zable("object_key",
someSerializableClassYouWantToPersist);
// etc. until you have everything important stored in the bundle
}
Then you use onCreate(Bundle) to get everything out of that persisted bundle and recreate your state.
@Override
onCreate(Bundle savedInstanceState) {
if(s...
Troubleshooting “Illegal mix of collations” error in mysql
...ery. Here is an example that uses the COLLATE clause:
SELECT * FROM table ORDER BY key COLLATE latin1_general_ci;
Another option is to use the BINARY operator:
BINARY str is the shorthand for CAST(str AS BINARY).
Your solution might look something like this:
SELECT * FROM table WHERE BINAR...
How find all unused classes in Intellij Idea?
...question )
But I want to find all unused classes, not methods, variables etc. Only classes. (it is difficult to find only classes in 3000 result list). How I can do that?
...
Convert a PHP script into a stand-alone windows executable
...ing from popular Phalanger. It allows PHP to be executed within the .NET/.NETCore by compiling the PHP code to pure MSIL.
Phalanger
http://v4.php-compiler.net/
http://wiki.php-compiler.net/Phalanger_Wiki
https://github.com/devsense/phalanger
Phalanger is a project which was started at Charles U...