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How do I use the new computeIfAbsent function?
...til.concurrent.ConcurrentHashMap;
public class Test {
public static void main(String[] s) {
Map<String, Boolean> whoLetDogsOut = new ConcurrentHashMap<>();
whoLetDogsOut.computeIfAbsent("snoop", k -> f(k));
whoLetDogsOut.computeIfAbsent("snoop", k -> f(...
Add a dependency in Maven
...
You'll have to do this in two steps:
1. Give your JAR a groupId, artifactId and version and add it to your repository.
If you don't have an internal repository, and you're just trying to add your JAR to your local repository, you can install it as follows, using any arbitrary groupId/a...
Overriding Binding in Guice
...Guice, and a use-case I can think of is that in a test I just want to override a single binding. I think I'd like to use the rest of the production level bindings to ensure everything is setup correctly and to avoid duplication.
...
MySQL 'create schema' and 'create database' - Is there any difference
... of MySQL 5.0.2.
this all goes back to an ANSI standard for SQL in the mid-80s.
That standard had a "CREATE SCHEMA" command, and it served to introduce
multiple name spaces for table and view names. All tables and views were
created within a "schema". I do not know whether that version defined...
How is “int* ptr = int()” value initialization not illegal?
...
int() is a constant expression with a value of 0, so it's a valid way of producing a null pointer constant. Ultimately, it's just a slightly different way of saying int *ptr = NULL;
share
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Returning from a finally block in Java
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The examples you provided are reason enough to not use flow-control from finally.
Even if there's a contrived example where it's "better," consider the developer who has to maintain your code later and who might not be aware of the subtleties. ...
Django connection to PostgreSQL: “Peer authentication failed”
...I had been using MySQL database no problem. I am new to PostgreSQL, but decided to switch because the host I ultimately plan to use for this project does not have MySQL.
...
Sublime Text 2: Trim trailing white space on demand
...is.
Highlight trailing spaces and delete them in a flash.
ST2 provides a way to automatically delete trailing spaces upon file
save. Depending on your settings, it may be more handy to just
highlight them and/or delete them by hand. This plugin provides just
that!
Usage: click "Edit...
Pass An Instantiated System.Type as a Type Parameter for a Generic Class
... Console.WriteLine("T={0}", typeof(T));
}
}
class Test
{
static void Main()
{
string typeName = "System.String";
Type typeArgument = Type.GetType(typeName);
Type genericClass = typeof(Generic<>);
// MakeGenericType is badly named
Type const...
Hibernate openSession() vs getCurrentSession()
... edited Jun 17 '15 at 13:54
Siddharth
8,7191111 gold badges7474 silver badges129129 bronze badges
answered Nov 8 '11 at 10:49
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