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Correct use of flush() in JPA/Hibernate
I was gathering information about the flush() method, but I'm not quite clear when to use it and how to use it correctly. From what I read, my understanding is that the contents of the persistence context will be synchronized with the database, i. e. issuing outstanding statements or refreshing enti...
What are the Ruby Gotchas a newbie should be warned about? [closed]
I have recently learned the Ruby programming language, and all in all it is a good language. But I was quite surprised to see that it was not as simple as I had expected. More precisely, the "rule of least-surprise" did not seem very respected to me (of course this is quite subjective). For examp...
mysql -> insert into tbl (select from another table) and some default values [duplicate]
As the title says, I am trying to insert into one table selecting values from another table and some default values.
5 Ans...
How do I provide a username and password when running “git clone git@remote.git”?
...harf's comment:
You can leave out the password so that it won't be logged in your Bash history file:
git clone https://username@github.com/username/repository.git
It will prompt you for your password.
Alternatively, you may use:
git clone https://username:password@github.com/username/repositor...
What do Clustered and Non clustered index actually mean?
...pplication programmer. I want to know about Clustered and Non clustered indexes .
I googled and what I found was :
11 An...
How to avoid having class data shared among instances?
...
You want this:
class a:
def __init__(self):
self.list = []
Declaring the variables inside the class declaration makes them "class" members and not instance members. Declaring them inside the __init__ method makes sure that a new instance of the ...
Difference between dict.clear() and assigning {} in Python
In python, is there a difference between calling clear() and assigning {} to a dictionary? If yes, what is it?
Example:
...
java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
I'm using the support library for my app. In my FragmentActivity I'm using an AsyncTask for downloading data from internet. In the onPreExecute() method I add a Fragment and in the onPostExecute() method I remove it again. When the orientation is changed in between, I get the above mentioned excepti...
Using .text() to retrieve only text not nested in child tags
...implementation based on the clone() method found here to get only the text inside the parent element.
Code provided for easy reference:
$("#foo")
.clone() //clone the element
.children() //select all the children
.remove() //remove all the children
.end() //again go back to ...
Get index of selected option with jQuery
I'm a little bit confused about how to get an index of a selected option from a HTML <select> item.
7 Answers
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