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What's an Aggregate Root?
I'm trying to get my head around how to properly use the repository pattern. The central concept of an Aggregate Root keeps coming up. When searching both the web and Stack Overflow for help with what an aggregate root is, I keep finding discussions about them and dead links to pages that are suppos...
SparseArray vs HashMap
I can think of several reasons why HashMap s with integer keys are much better than SparseArray s:
7 Answers
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C# nullable string error
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System.String is a reference type and already "nullable".
Nullable<T> and the ? suffix are for value types such as Int32, Double, DateTime, etc.
share
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Hibernate Annotations - Which is better, field or property access?
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I prefer accessors, since I can add some business logic to my accessors whenever I need.
Here's an example:
@Entity
public class Person {
@Column("nickName")
public String getNickName(){
if(this.name != null) return generateFunnyNick(this.name);
else return "Jo...
Rake just one migration
I'm trying to run just one migration out of a whole bunch in my rails app. How can I do this? I don't want to run any of the migrations before or after it. Thanks.
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Run command on the Ansible host
...host
hosts: 127.0.0.1
connection: local
tasks:
- name: check out a git repository
git: repo=git://foosball.example.org/path/to/repo.git dest=/local/path
See Local Playbooks in the Ansible documentation for more details.
If you just want to run a single task on your Ansible host, you c...
Fastest way to determine if an integer's square root is an integer
I'm looking for the fastest way to determine if a long value is a perfect square (i.e. its square root is another integer):
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Do you (really) write exception safe code? [closed]
Exception handling (EH) seems to be the current standard, and by searching the web, I can not find any novel ideas or methods that try to improve or replace it (well, some variations exist, but nothing novel).
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what is Promotional and Feature graphic in Android Market/Play Store?
What does it mean and need whether we are uploading our app into the market? Please Explain or give me a related links.
7 A...
How do I close an open port from the terminal on the Mac?
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Find out the process ID (PID) which is occupying the port number (e.g., 5955) you would like to free
sudo lsof -i :5955
Kill the process which is currently using the port using its PID
sudo kill -9 PID
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