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Correct use of flush() in JPA/Hibernate
...ation on business methods) which means that a transaction is automatically started when entering the method and commited / rolled back at the end. If you let the EntityManager handle the database synchronization, sql statements execution will be only triggered just before the commit, leading to shor...
Does the APNS device token ever change, once created?
...re this fails.
Second, here is the upgrade test sequence and results:
Start with iOS4 installed on iPhone4; backup device in iTunes
Upgrade to iOS5
From a previous test, I know that the APN token is now different
Restore the backup to the device
The APN token is now the same as step 1.
Re...
PermGen elimination in JDK 8
... removed in HotSpot for JDK8 because of following drawbacks
Fixed size at startup – difficult to tune.
Internal Hotspot types were Java objects : Could move with full GC, opaque, not strongly typed and hard to debug, needed meta-metadata.
Simplify full collections : Special iterators for metadata...
Is there a good reason to use upper case for SQL keywords? [closed]
...per case, but is there really any reason to use upper case for keywords? I started using upper case because I was just trying to match what SQL Server gives me whenever I tried to create something, like a new stored procedure. But then, I felt terrible for my baby (5th) finger, that always needs to ...
AngularJS: How can I pass variables between controllers?
... Storing off a property inside of a service is wrong (but convenient). I started using $cacheFactory to read and write data. I use almost an identical service as Gloopy but instead of storing state in the service, it is now in the cache. First create a cache service: angular.module('CacheServi...
how to get program files x86 env variable?
... "The ProgramW6432 and CommonProgramW6432 environment variables were added starting with Windows 7 and Windows Server 2008 R2." Wikipedia directly contradicts this; interestingly, Wikipedia only lists the three versions that don't support this variable according to MSDN. Unfortunately I don't have...
How to detect if my shell script is running through a pipe?
... that this unfortunate behavior was introduced when recent versions of ssh started using pipes for non-TTY STDIO. Prior versions used sockets, which COULD be differentiated from within bash by using [[ -S ]].
When it matters
This limitation normally causes problems when you want to write a bash s...
What is the minimum valid JSON?
...ime of writing, JSON was solely described in RFC4627. It describes (at the start of "2") a JSON text as being a serialized object or array.
This means that only {} and [] are valid, complete JSON strings in parsers and stringifiers which adhere to that standard.
However, the introduction of ECMA-404...
What Java ORM do you prefer, and why? [closed]
It's a pretty open ended question. I'll be starting out a new project and am looking at different ORMs to integrate with database access.
...
How to make a PHP SOAP call using the SoapClient class
... @user16441 Can you post the WSDL and schema of the service? I usually start by figuring out what XML the service expects, then using WireShark to figure out what my client is actually sending.
– davidfmatheson
Jul 30 '12 at 13:51
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