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What is the difference between aggregation, composition and dependency? [duplicate]
...ting, I guess it depends on how you look at it. I liked the answer, but u know I am confused now.
– Kowser
Sep 4 '12 at 5:58
14
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Java Name Hiding: The Hard Way
...rio, you COULD construct an instance of the class using reflection if you know its fully qualified name.
Java: newInstance of class that has no default constructor
And then invoke the method on the instance.
Or, just invoke the method itself with reflection:
Invoking a static method using reflect...
Symfony2 : How to get form validation errors after binding the request to the form
...tMessage();
}
return $errors;
}
as the Form::getErrors() method now returns an instance of FormErrorIterator, unless you switch the second argument ($flatten) to true. (It will then return a FormError instance, and you will have to call the getMessage() method directly, without the curren...
Best practices when running Node.js with port 80 (Ubuntu / Linode) [closed]
...p2-bin
sudo setcap cap_net_bind_service=+ep `readlink -f \`which node\``
Now, when you tell a Node application that you want it to run on port 80, it will not complain.
Check this reference link
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Are C++ enums signed or unsigned?
... // signed enum
enum Y : unsigned int { ... }; // unsigned enum
Even now, though, some simple validation can be achieved by using the enum as a variable or parameter type like this:
enum Fruit { Apple, Banana };
enum Fruit fruitVariable = Banana; // Okay, Banana is a member of the Fruit enu...
Convert a JSON string to object in Java ME?
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JSONParser is now deprecated.
– Varda Elentári
Jun 21 '17 at 15:34
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HTML text input allow only numeric input
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} else {
this.value = "";
}
});
});
}
You can now use the setInputFilter function to install an input filter:
setInputFilter(document.getElementById("myTextBox"), function(value) {
return /^\d*\.?\d*$/.test(value); // Allow digits and '.' only, using a RegExp
});
Se...
How do I make a JAR from a .java file?
...et your other project and add this .jar file to project libraries.
You can now reference classes from this library and its methods directly from code, if import is automatically done for you.
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Format date in a specific timezone
...imezone ("America/Phoenix") if you want to handle DST and other rules for known time zones.
– quietmint
Aug 4 '17 at 1:17
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Mysql error 1452 - Cannot add or update a child row: a foreign key constraint fails
...at references another, but it is failing for some reason. With my limited knowledge of MySQL, the only thing that could possibly be suspect is that there is a foreign key on a different table referencing the one I am trying to reference.
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