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NHibernate ISession Flush: Where and when to use it, and why?
...e ITransaction API, you don't need to worry about this step. It will be performed implicitly when the transaction is committed. Otherwise you should call ISession.Flush() to ensure that all changes are synchronized with the database.
Committing the database transaction
If you are using the NHibernat...
Reference requirements.txt for the install_requires kwarg in setuptools setup.py file
...p.py are silly duplicates, but it's important to understand that while the form is similar, the intended function is very different.
The goal of a package author, when specifying dependencies, is to say "wherever you install this package, these are the other packages you need, in order for this pac...
How to return an array from JNI to Java?
...elpful for situations for example: when someone needs to return data in 2D format to draw some line with x and y points. The below example shows how a jobjectArray can return data in the form of following format:
Java input to the JNI:
Array[Arraylist of x float points][Arraylist of y float points]...
Why is address zero used for the null pointer?
...on can use whatever value it wants or needs in the running code. Some platforms have a special pointer value that's 'invalid' that the implementation might use as the null pointer. The C FAQ has a question, "Seriously, have any actual machines really used nonzero null pointers, or different represe...
Difference between a theta join, equijoin and natural join
...ct differences are fine, I want to show how the relational algebra is transformed to SQL and what the actual value of the 3 concepts is.
The key concept in your question is the idea of a join. To understand a join you need to understand a Cartesian Product (the example is based on SQL where the eq...
How to export query result to csv in Oracle SQL Developer?
...
Version I am using
Update 5th May 2012
Jeff Smith has blogged showing, what I believe is the superior method to get CSV output from SQL Developer. Jeff's method is shown as Method 1 below:
Method 1
Add the comment /*csv*/ to your SQL query and run the query...
Difference between author and committer in Git?
...omly selected patch and the corresponding commit:
https://lkml.org/lkml/2018/1/25/568
https://github.com/torvalds/linux/commit/5beda7d54eafece4c974cfa9fbb9f60fb18fd20a
Git web interfaces like GitHub and GitLab may or may not generate author != committer
Since Git(Hub|Lab) hold both the upstream...
Why do you need to create a cursor when querying a sqlite database?
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Different floating point result with optimization enabled - compiler bug?
.../Redhat 5 and CentOS/Redhat 6. I compiled many my programs under these platforms, I am worry about that will cause unexpected bugs inside my programs.
– Bear
Sep 22 '11 at 16:16
...
Git, rewrite previous commit usernames and emails
...
101
See here:
git filter-branch -f --env-filter \
"GIT_AUTHOR_NAME='Newname'; GIT_AUTHOR_EMAIL='new...