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Java - JPA - @Version annotation
...On update, the field annotated with @Version will be incremented and added to the WHERE clause, something like this:
UPDATE MYENTITY SET ..., VERSION = VERSION + 1 WHERE ((ID = ?) AND (VERSION = ?))
If the WHERE clause fails to match a record (because the same entity has already been updated by a...
LINQ to Entities only supports casting EDM primitive or enumeration types with IEntity interface
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I was able to resolve this by adding the class generic type constraint to the extension method. I'm not sure why it works, though.
public static T GetById<T>(this IQueryable<T> collection, Guid id)
where T : class, IEnt...
Why do most C developers use define instead of const? [duplicate]
...ones from C++ coders who don't know C.
– R.. GitHub STOP HELPING ICE
Oct 26 '10 at 13:59
3
@C. Ro...
Copy file or directories recursively in Python
Python seems to have functions for copying files (e.g. shutil.copy ) and functions for copying directories (e.g. shutil.copytree ) but I haven't found any function that handles both. Sure, it's trivial to check whether you want to copy a file or a directory, but it seems like a strange omission.
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How to get the pure text without HTML element using JavaScript?
I have the 1 button and some text in my HTML like the following:
10 Answers
10
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“where 1=1” statement [duplicate]
I saw some people use a statement to query a table in a MySQL database like the following:
10 Answers
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‘ld: warning: directory not found for option’
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You need to do this:
Click on your project (targets)
Click on Build Settings
if your error includes the -L flag, then delete the values in Library Search Paths
if your error includes the -F flag, then delete the values in Framewo...
How do I remove a single file from the staging area (undo git add)?
Situation: I have a Git repository with files already in the index. I make changes to several files, open Git and add these files to my staging area with "git add ."
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How do I redirect with JavaScript? [duplicate]
How do you redirect to a page from another page with JavaScript?
6 Answers
6
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How to map with index in Ruby?
What is the easiest way to convert
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