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JPA EntityManager: Why use persist() over merge()?
EntityManager.merge() can insert new objects and update existing ones.
15 Answers
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how to release localhost from Error: listen EADDRINUSE
i am testing a server written in nodejs on windows 7
and when i try to run the tester in the command line i get the following error
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Android: Go back to previous activity
I want to do something simple on android app.
How is it possible to go back to a previous activity.
23 Answers
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What exceptions should be thrown for invalid or unexpected parameters in .NET?
...d ArgumentOutOfRangeException.
ArgumentException – Something is wrong with the argument.
ArgumentNullException – Argument is null.
ArgumentOutOfRangeException – I don’t use this one much, but a common use is indexing into a collection, and giving an index which is to large.
There are oth...
Run PHP Task Asynchronously
...de where I need to complete some task, but I don't want to make the user wait for the result. For example, when creating a new account, I need to send them a welcome email. But when they hit the 'Finish Registration' button, I don't want to make them wait until the email is actually sent, I just wan...
How to test an Android Library Project
I am writing an Android Library Project basing on Android Bitmap class (call it AndroindLib) which contains only utility class (no activity). I tried to test it using Android JUnit, but it keeps complaining that can't find the AnroidLib.apk
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Forking from GitHub to Bitbucket
I'm working on a project based on CakePHP , that's hosted on GitHub . My project is being hosted on Bitbucket . Both of them use git . Basically I'd like to create a ‘fork’ (I don't know if I'm using the right terms, since I'm new to git ) of CakePHP in my Bitbucket repository, in order t...
When to use DataContract and DataMember attributes?
...ry confused about the DataContract attribute in WCF. As per my knowledge it is used for serializating user defined type like classes. I wrote one class which is exposed at client side like this.
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Why does calling a function in the Node.js REPL with )( work?
Why is it possible to call function in JavaScript like this, tested with node.js:
3 Answers
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Difference between git stash pop and git stash apply
I've been using git stash pop for quite some time. I recently found out about the git stash apply command. When I tried it out, it seemed to work the same as git stash pop .
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