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In JPA 2, using a CriteriaQuery, how to count results
... is the reference one, for example, if you have students left join courses then picking student should be the natural thing because there could be courses that the student is not enrolled.
– Guido Medina
Jun 8 '14 at 12:00
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What does f+++++++++ mean in rsync logs?
...when compared to the target directory. The bit flags produced by rsync can then be decoded to determine what changed. To decode each bit's meaning, use the following table.
Explanation of each bit position and value in rsync's output:
YXcstpoguax path/to/file
|||||||||||
||||||||||╰- x: The e...
How to check if a value exists in an array in Ruby
...y.
The preferred one is include? or, for repeated access, creat a Set and then call include? or member?.
Here are all of them:
array.include?(element) # preferred method
array.member?(element)
array.to_set.include?(element)
array.to_set.member?(element)
array.index(element) > 0
array.find_inde...
Why do we have map, fmap and liftM?
... in Haskell 1.3. I.e., in Haskell 1.3 fmap was called map. This change was then reverted in Haskell 1.4 and fmap was introduced. The reason for this change was pedagogical; when teaching Haskell to beginners the very general type of map made error messages more difficult to understand. In my opinion...
Super-simple example of C# observer/observable with delegates
...publishers who will do some logic and publish an "event."
Publishers will then send out their event only to subscribers who have subscribed to receive the specific event.
In C#, any object can publish a set of events to which other applications can subscribe.
When the publishing class raises an ...
In Git, how can I write the current commit hash to a file in the same commit
...g up with a file that's different from what git's tracking.
Your code can then reference this file when it needs the version number, or a build process could incorporate the information into the final product. The latter is actually how git itself gets its version numbers - the build process grabs ...
Rails filtering array of objects by attribute value
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I do a db query and receive an array of objects. I then want to create two separate lists from that one array by filtering the objects based on the value of their attributes (See original post) - cheers
– joepour
Apr 9 '12 at 8:55
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git discard all changes and pull from upstream
...eclone the remote repo, or you can reset --hard to the common ancestor and then do a pull, which will fast-forward to the latest commit on the remote master.
To be concrete, here's a simple extension of Nevik Rehnel's original answer:
git reset --hard origin/master
git pull origin master
NOTE: u...
Saving vim macros
...nds in normal mode.
To save it you open up .vimrc and paste the contents, then the register will be around the next time you start vim.
The format is something like:
let @q = 'macro contents'
Be careful of quotes, though. They would have to be escaped properly.
So to save a macro you can do:
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Exception.Message vs Exception.ToString()
...ned string.
If there is no error message or if it is an empty string (""), then no error message is returned. The name of the inner exception and the stack trace are returned only if they are not a null reference (Nothing in Visual Basic).
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