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What is a NullPointerException, and how do I fix it?
...n the most trivial cases, the compiler will catch the problem and let you know that "num may not have been initialized," but sometimes you may write code that does not directly create the object.
For instance, you may have a method as follows:
public void doSomething(SomeObject obj) {
//do someth...
Is there a way to automate the android sdk installation?
Now I have to download and install the Android SDK and AVD Manager, and then install the APIs, tools through the UI. Is there a way to automate this process?
...
What is the difference between build.sbt and build.scala?
...ry tutorial I see a build.sbt file which describes project settings. But now I have installed giter8 and created a project from template. And generated project from template missed build.sbt file, but it have build.scala (which seems used for same purposes, but it is more flexible).
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Is Mono ready for prime time? [closed]
...this task; (b) you are starting to write some new code, and you want to know if Mono is mature enough.
For the first case, you can use the Mono Migration Analyzer tool (Moma) to evaluate how far your application is from running on Mono. If the evaluation comes back with flying colors, you should...
Netty vs Apache MINA
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Update: Just use Netty. It is now a mature project with all the bells and whistles required for building protocol clients and servers. It has strong community with several active contributors backed by enterprises. It also has a book, 'Netty in Action'. I...
c# datatable insert column at position 0
does anyone know the best way to insert a column in a datatable at position 0?
3 Answers
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How to use Active Support core extensions
... up loading a lot of unneeded stuff with a simple require 'activesupport'. Now we have to do things like
require 'active_support/core_ext/object/blank'
If you don't care about granularity, you can choose to load bigger chunks. If you want everything in one big gulp use...
For 1.9.2:
rvm 1.9.2
...
When to use RSpec let()?
...able, and a few of them started writing with it. I've got enough spec code now using let() that I run into some of those problems too. I find myself going to the example, and starting from the innermost example group, work myself back up. It is the same skill as using a highly meta-programmable envi...
Can someone explain mappedBy in JPA and Hibernate?
...urce of truth when it comes to managing a one-to-many table relationship.
Now, if you take a bidirectional entity relationship that maps on the one-to-many table relationship we saw previously:
If you take a look at the diagram above, you can see that there are two ways to manage this relationsh...
Aliases in Windows command prompt
...er here!
Here's a .reg file to help you install the alias.cmd. It's set now as an example to a dropbox folder as suggested above.
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Command Processor]
"AutoRun"="%USERPROFILE%\\alias.cmd"
For single-user applications, ...