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Static nested class in Java, why?
... compiler will implicitly prepend the arg sequence of every constructor in order to pass a reference of an instance of the enclosing class. Pretty simple.
– tonix
Mar 12 '15 at 6:55
...
Debug vs. Release performance
...olved that slows down the program. For this particular code, it was on the order of 0.2-0.3 seconds runtime on its own, and 30+ seconds when the debugger was attached.
Simple solution though, just remove the debug messages that was no longer needed.
...
Why git AuthorDate is different from CommitDate?
...could happen if you make your commit and send your patch to another one in order to apply the patch in another repo: the author date will be the date of your git commit, the commit date will be set to that date when the patch is applied in the other repo.
If you send the patch to two colleagues, th...
Execute another jar in a Java program
... idea is that given access to a jar, how do you add it to the classpath in order to load classes out of it.
– Jherico
Aug 24 '09 at 4:35
1
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Generate Java classes from .XSD files…?
...t(name="Item") indicates that I want to be the root element.
@XmlType(propOrder = {"name", "price"}) indicates the order that I want the element to be arranged in XML output.
@XmlAttribute(name="id", ...) indicates that id is an attribute to root element.
@XmlElement(....) indicates that I want pr...
How do I run Redis on Windows?
...dis 2.6 binaries.
So you'll need to download binaries from 2 branches in order to get all the necessary bits. Without further ado, here are the steps:
Download and extract the Redis binaries from the 2.6 branch
Copy all extracted binaries to c:\redis\bin
Create another folder at c:\redis\inst1
D...
Access denied for user 'root'@'localhost' while attempting to grant privileges. How do I grant privi
...s: ERROR 1410 (42000): You are not allowed to create a user with GRANT
In order to create users in version 8 you have to do it in two steps:
CREATE USER 'steves'@'[hostname].com' IDENTIFIED BY '[OBSCURED]';
GRANT ALL PRIVILEGES ON *.* TO 'steves'@'[hostname].com' WITH GRANT OPTION;
Of course, if...
Plot correlation matrix into a graph
..., addcolorlabel="no")
corrplot(M, method="number")
corrplot(M)
corrplot(M, order ="AOE")
corrplot(M, order ="AOE", addCoef.col="grey")
corrplot(M, order="AOE", col=col1(20), cl.length=21,addCoef.col="grey")
corrplot(M, order="AOE", col=col1(10),addCoef.col="grey")
corrplot(M, order="AOE", col=col2...
PostgreSQL - fetch the row which has the Max value for a column
...lue(trans_id) OVER wnd
FROM lives
WINDOW wnd AS (
PARTITION BY usr_id ORDER BY time_stamp, trans_id
ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING
);
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Difference between HashMap, LinkedHashMap and TreeMap
... offer mostly the same functionality. The most important difference is the order in which iteration through the entries will happen:
HashMap makes absolutely no guarantees about the iteration order. It can (and will) even change completely when new elements are added.
TreeMap will iterate accordin...