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How to stop a goroutine
...ke to use the tomb package. It's basically a suped up quit channel, but it does nice things like pass back any errors as well. The routine under control still has the responsibility of checking for remote kill signals. Afaik it's not possible to get an "id" of a goroutine and kill it if it's misbeha...
Case-insensitive string comparison in C++ [closed]
...ally exclusive. It must always use shortest possible representation, if it does not, it's a malformed UTF-8 sequence or code point that must be treated with care.
– Wiz
Nov 10 '11 at 23:44
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Efficient method to generate UUID String in JAVA (UUID.randomUUID().toString() without the dashes)
...
This does it:
public static void main(String[] args) {
final String uuid = UUID.randomUUID().toString().replace("-", "");
System.out.println("uuid = " + uuid);
}
...
find vs find_by vs where
...- Parameter: key/value
Example:
User.find_by name: 'John', email: 'john@doe.com'
2- If found: It returns the object.
3- If not found: returns nil.
Note: If you want it to raise ActiveRecord::RecordNotFound use find_by!
Model.where
1- Parameter: same as find_by
2- If found: It returns Activ...
Jackson enum Serializing and DeSerializer
...remember to add the name in two places. I much prefer a solution that just does the right thing without decorating the internals of an enum with a map.
– mttdbrd
Oct 10 '16 at 18:41
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Select row with most recent date per user
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No need for subqueries! Moreover, this solution doesn't work if there are two records with exactly the same time. There is no need to try reinvent the wheel every time, as this is common problem - instead, go for already tested and optimized solutions - @Prodikl see my an...
How to jump from Intellij terminal to editor with shortcut
... IDEA to the editor window with Esc . In Intellij's terminal window, this does not work. Does anyone know how to do this with a keyboard shortcut? This would be nice since I can jump from my editor to the terminal with Alt + F12 but I cannot do it the other way without using my mouse.
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How to implement a rule engine?
... compiles the Rules into fast executable code (using Expression trees) and does not need any complicated switch statements:
(Edit : full working example with generic method)
public Func<User, bool> CompileRule(Rule r)
{
var paramUser = Expression.Parameter(typeof(User));
Expression exp...
How can I determine the URL that a local Git repository was originally cloned from?
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But the original URL doesn't have to be the URL of the currently used remote. To show the actual used URL, you would need this solution then: stackoverflow.com/a/40630957/1069083
– rubo77
Nov 16 '16 at 11:30...
What are the most widely used C++ vector/matrix math/linear algebra libraries, and their cost and be
...f their own hand-rolled vertor/matrix math.
I've found it quite nice - it does everything via templates, so it's very flexible, and very fast.
Edit:
After the comments discussion, and edits, I thought I'd throw out some more information about the benefits and downsides to specific implementatio...