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JPA: unidirectional many-to-one and cascading delete
...cade REMOVE operations so that EntityManager.remove will remove the parent and the children. You can also specify orphanRemoval as true, to delete any orphaned children when the child entity in the parent collection is set to null, i.e. remove the child when it is not present in any parent's collect...
Hash Map in Python
... The second example just builds a dict in the same ways as before and then copies it. The other use dict, which would be more appopriate in this context, is dict(key1=value1, key2=value2, ...) but that requires the keys to strings which are also valid Python identifiers (and internally, thi...
Select rows which are not present in other table
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There are basically 4 techniques for this task, all of them standard SQL.
NOT EXISTS
Often fastest in Postgres.
SELECT ip
FROM login_log l
WHERE NOT EXISTS (
SELECT -- SELECT list mostly irrelevant; can just be empty in Postgres
FROM ip_location
WHERE ip = l.ip
...
IE10 renders in IE7 mode. How to force Standards mode?
...ssumption that most webpages were written to target earlier versions of IE and looks at the doctype, meta tags and HTML to determine the best compatibility mode (sometimes incorrectly). Even with a HTML5 doctype IE will still place your website in compatibility mode if it's an intranet site.
To ens...
RESTful API methods; HEAD & OPTIONS
I'm writing a RESTful API module for an application in PHP, and I'm a bit mixed on the verbs HEAD and OPTIONS .
3 Answer...
How can I make a div not larger than its contents?
...nter the parent of the table by setting "text-align:center" on it's parent and "text-align:left" on it (e.g. <body style="text-align:center"><span style="text-align:left; display:inline-block;"><table>...</table></span></body>)
– bernstein
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Install gitk on Mac
...re/commit/dfa3ccf1e7d3901e371b5140b935839ba9d8b706)
Run the following commands at the terminal:
brew update
brew install git
brew install git-gui
If you get an error indicating it could not link git, then you may need to change permissions/owners of the files it mentions.
Once completed, run:
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How to properly import a selfsigned certificate into Java keystore that is available to all Java app
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On Windows the easiest way is to use the program portecle.
Download and install portecle.
First make 100% sure you know which JRE or JDK is being used to run your program. On a 64 bit Windows 7 there could be quite a few JREs. Process Explorer can help you with this or you can use: System.out...
Android selector & text color
...text.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true"
android:color="#000000" /> <!-- pressed -->
<item android:state_focused="true"
android...
Why do I get a SyntaxError for a Unicode escape in my file path?
The folder I want to get to is called python and is on my desktop.
7 Answers
7
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