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What does ||= (or-equals) mean in Ruby?
...threads on the Ruby mailing-list whose only purpose is to collect links to all the other threads on the Ruby mailing-list that discuss this issue.
Here's one: The definitive list of ||= (OR Equal) threads and pages
If you really want to know what is going on, take a look at Section 11.4.2.3 "Abbrevi...
Visual Studio refuses to forget breakpoints?
...
go to Debug menu then Delete All Breakpoints Ctrl+Shift+F9
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Code formatting shortcuts in Android Studio for Operation Systems
...Alt + L
macOS: Option + Command + L
Reference: Key Commands and here are all of the commands for Windows/ Linux users and for Mac users.
As Rohit faced a problem in Ubuntu with the format code shortcut, this is due to the Ctrl + Alt + L key being used to lock the screen in Ubuntu.
I found that...
String Concatenation using '+' operator
... code:
string x = "hello";
string y = "there";
string z = "chaps";
string all = x + y + z;
actually gets compiled as:
string x = "hello";
string y = "there";
string z = "chaps";
string all = string.Concat(x, y, z);
(Gah - intervening edit removed other bits accidentally.)
The benefit of the C...
How can I restart a Java application?
...new ProcessBuilder(command);
builder.start();
System.exit(0);
}
Basically it does the following:
Find the java executable (I used the java binary here, but that depends on your requirements)
Find the application (a jar in my case, using the MyClassInTheJar class to find the jar location itse...
ANTLR: Is there a simple example?
...r, and evaluator using ANTLR4.
You first create a grammar. Below is a small grammar that you can use to evaluate expressions that are built using the 4 basic math operators: +, -, * and /. You can also group expressions using parenthesis.
Note that this grammar is just a very basic one: it does ...
Undo a git stash
...ll not reset what is in the staging directory, so you will have to restage all that (which can be annoying if you had just done a complex git add -p
– Nick
Jan 2 '13 at 17:31
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C++ equivalent of StringBuffer/StringBuilder?
...f after profiling your code you discover this makes an improvement.
I normally use either std::string or std::stringstream. I have never had any problems with these. I would normally reserve some room first if I know the rough size of the string in advance.
I have seen other people make their ow...
How do I find out which computer is the domain controller in Windows programmatically?
...dows, type the following commande:
nltest /dclist:{domainname}
It lists all domain controllers in particular domain
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What ports does RabbitMQ use?
What ports does RabbitMQ Server use or need to have open on the firewall for a cluster of nodes?
4 Answers
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