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What's the difference between struct and class in .NET?
...ning a value type contains the entire value type value. For a struct, that means that the variable contains the entire struct, with all its fields.
A variable containing a reference type contains a pointer, or a reference to somewhere else in memory where the actual value resides.
This has one ben...
Using “Object.create” instead of “new”
... 1. Thanks for the pointer to differential inheritance. 2. Does this mean no more constructors? I need to remember to set 'id' to MY_GLOBAL.nextId() every time I create a user?
– Graham King
Apr 25 '10 at 22:02
...
jQuery Ajax POST example with PHP
...borting the previous request, because it's an
asynchronous request, meaning once it's sent it's out
there. But in case you want to abort it you can do it
by abort(). jQuery Ajax methods return an XMLHttpRequest
object, so you can just use abort(). */
ajaxRequest= $...
back button callback in navigationController in iOS
...n having a done or save button at the right-side).
– meaning-matters
Apr 25 '13 at 19:34
7
Or whe...
PersistentObjectException: detached entity passed to persist thrown by JPA and Hibernate
...t the exception "detached entity passed to persist". The Account entity is meant! Not the Transaction you call persist on.
You generally don't want to propagate from child to parent. Unfortunately there are many code examples in books (even in good ones) and through the net, which do exactly that...
Does PNG contain EXIF data like JPG?
...
Did you mean:
Do PNG files contain the metadata items you listed? Short answer: It varies.
Does PNG use the EXIF standard for storing such metadata? Short answer: Generally no.
Generally, PNG uses various chunks that are part o...
What is the Difference Between Mercurial and Git?
.... Try taking a peek at the git-instaweb.sh file if you want to know what I mean: it is a shell script which generates a Ruby script, which I think runs a webserver. The shell script generates another shell script to launch the first Ruby script. There is also a bit of Perl, for good measure.
I like...
What are the differences between double-dot “..” and triple-dot “…” in Git diff commit ranges?
...the commit graph. The .. and ... notations in git diff have the following meanings:
# Left side in the illustration below:
git diff foo..bar
git diff foo bar # same thing as above
# Right side in the illustration below:
git diff foo...bar
git diff $(git merge-base foo bar) bar # same thing as ab...
Hibernate throws MultipleBagFetchException - cannot simultaneously fetch multiple bags
... the PASS_DISTINCT_THROUGH JPA query hint to false.
DISTINCT has two meanings in JPQL, and here, we need it to deduplicate the Java object references returned by getResultList on the Java side, not the SQL side. Check out this article for more details.
As long as you fetch at most one collec...
How to sparsely checkout only one single file from a git repository?
...it show branch:path/to/file >file
Or you must clone first the repo, meaning you get the full history:
- in the .git repo
- in the working tree.
But then you can do a sparse checkout (if you are using Git1.7+),:
enable the sparse checkout option (git config core.sparsecheckout true)
ad...