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What is the optimal length for an email address in a database?
...r inbox. Essentially, they’ll have a unique (sub-)email per each website/service/app. For example, let’s imagine that my normal email is my first name and last name at some company name: firstnameandlastone@superacmecompany.com. That’s already ~40 characters. Now, if I used a plus notation for...
How can I handle time zones in my webapp?
...d Readings:
Determine timezone from latitude/longitude without using web services like Geonames.org
Timezone lookup from latitude longitude
I know its just about showing some idea how to solve this problem. But see how accurate & light-weight it becomes on users when the Timezone is determin...
Why would finding a type's initializer throw a NullReferenceException?
...on my machine and I've tracked a connection with the System.Runtime.InteropServices._Type Interface, which is implemented by the System.Type class.
Initially, I've found at least 3 workaround approaches for fixing the problem:
Simply by casting the Type to _Type inside the Main method:
var cctor...
Differences between Java 8 Date Time API (java.time) and Joda-Time
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Why does GCC generate such radically different assembly for nearly the same C code?
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Is there an S3 policy for limiting access to only see/access one bucket?
...) Also shows of the number of buckets = number of clients using the backup service.
(2) use one bucket with client specific folders
This is how Amazon suggests by their S3/IAM examples to provide space to access only by certain users or user groups. See:
AWS Example IAM Policies
Advantage: fairly...
What is the difference between task and thread?
...is no need for a thread to sit around and wait for the data when it can be servicing other requests. Instead, the Task might register a callback to receive the value(s) when they're ready.
In particular, the Task does not say why it is that it takes such a long time to return the value. It might be...
Java EE 6 @javax.annotation.ManagedBean vs. @javax.inject.Named vs. @javax.faces.ManagedBean
...Bean")
@RequestScoped
public class SomeBean {
@Inject
private SomeService someService;
}
Automatic injection like that defined above can be controlled through the use of Qualifiers that can help match the specific class that you want injected. If you have multiple payment types, you might...
AWS Difference between a snapshot and AMI
...
The major difference is between the type of service referred to. A snapshot is of an EBS volume where you are able to save state and reboot with the same data at a certain point in time.
An AMI is similar, but its for the EC2 instances themselves. You cannot take a sn...
How to move Jenkins from one PC to another
...n Target Jenkins go to ThinBackup --> Restore, and then restart Jenkins service.
If some Plugins or Jobs are missing, copy the backup content directly to the target JENKINS_HOME.
If you had user authentication on the source Jenkins, and now locked out on the target Jenkins, then edit Jenkins conf...