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How to set Oracle's Java as the default Java in Ubuntu?
...e a directory somewhere you like in your file system for example /usr/java now extract the files you just downloaded in that directory:
$ sudo tar xvzf jdk-8u5-linux-i586.tar.gz -C /usr/java
now to set your JAVA_HOME environment variable:
$ JAVA_HOME=/usr/java/jdk1.8.0_05/
$ sudo update-alternat...
Create Directory When Writing To File In Node.js
...
Node > 10.12.0
fs.mkdir now accepts a { recursive: true } option like so:
// Creates /tmp/a/apple, regardless of whether `/tmp` and /tmp/a exist.
fs.mkdir('/tmp/a/apple', { recursive: true }, (err) => {
if (err) throw err;
});
or with a prom...
What is null in Java?
...ify:
Uninitialized state
Termination condition
Non-existing object
An unknown value
How is it represented in the memory?
In Java? None of your concern. And it's best kept that way.
Is null a good thing?
This is now borderline subjective. Some people say that null causes many programme...
.NET 4.0 has a new GAC, why?
%windir%\Microsoft.NET\assembly\ is the new GAC . Does it mean now we have to manage two GACs, one for .NET 2.0-3.5 applications and the other for .NET 4.0 applications?
...
Difference between a Message Broker and an ESB
... is the CLEAR demarcating difference between an Message Broker and an ESB? Now here I am trying to compare products, Websphere Broker and Mule ESB!!
...
Spring DAO vs Spring ORM vs Spring JDBC
...to the proper DataAccessException subclass.
As an example, suppose you're now using Hibernate, and your service layer catches HibernateException in order to react to it. If you change to JPA, your DAOs interfaces should not change, and the service layer will still compile with blocks that catches H...
Why should hash functions use a prime number modulus?
...or likely cases, since collisions reduce the efficiency of the hashtable.
Now, suppose someone puts a whole bunch of values into a hashtable that have some relationship between the items, like all having the same first character. This is a fairly predictable usage pattern, I'd say, so we don't want...
PHP “php://input” vs $_POST
...1.1
{"key1":"value1","key2":"value2","key3":"value3"}
The content would now be application/json (or at least none of the above mentioned), so PHP's $_POST-wrapper doesn't know how to handle that (yet).
The data is still there, you just can't access it through the wrapper. So you need to fetch i...
Where can I find Android source code online? [closed]
...up android. Some of the projects (such as Kernel) have been removed and it now only points you to clonable git repositories.
To get all the code locally, you can use the repo helper program, or you can just clone individual repositories.
And others:
Downloading the Source Tree
...
Use numpy array in shared memory for multiprocessing
...
p.start()
p.join()
# Print out the changed values
print "Now, the first two elements of arr = %s"%a[:2]
b = numpy.frombuffer(a.get_obj())
b[0] = 10.0
print a[0]
When run, this prints out the first element of a now being 10.0, showing a and b are just two views into ...