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What is Virtual DOM?
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React creates a tree of custom objects representing a part of the DOM. For example, instead of creating an actual DIV element containing a UL element, it creates a React.div object that contains a React.ul object. It can manipulate these objects ver...
Direct casting vs 'as' operator?
...ect type) This is helpful since a lot of the time you would rather throw a custom one exception. But it is very true that blind as calls are bad.
– Guvante
Sep 25 '08 at 10:48
5
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Passing a String by Reference in Java?
... StringBuilder or else some container (an array or an AtomicReference or a custom container class) that gives you an additional level of pointer indirection. Alternatively, just return the new value and assign it:
class StringFiller2 {
static String fillString(String zText) {
zText += "foo";
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Is there a builtin confirmation dialog in Windows Forms?
...eople to confirm information, that sounds like you probably want to show a custom dialog - which you can do with Form.ShowDialog.
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C++ mark as deprecated
...rence is usually to define a "warning" macro since most toolchains support custom compiler warnings. Then you can go on with a specific warning macro for deprecation etc.
For the platforms supporting dedicated deprecation methods you can use that instead of warnings.
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uint8_t can't be printed with cout
...l_chars;
cout << i << endl;
}
}
output:
*
42
A custom stream manipulator would also be possible.
The unary plus operator is a neat idiom too (cout << +i << endl).
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How do I run a Node.js application as its own process?
...script
echo $POST_START_MESSAGE_TO_LOG >> $LOG_FILE
end script
Customize all before #########, create a file in /etc/init/your-service.conf and paste it there.
Then you can:
start your-service
stop your-service
restart your-service
status your-service
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JavaScript arrays braces vs brackets
...nt1');
o.push('element2');
o['property1'] = 'property value'; // define a custom property.
console.log(o.property1);
console.log(o.length); // Outputs '2' as we've only push()'ed two elements onto the Array
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Add column to SQL Server
...ename ADD columname DATATYPE(size);
And here is an example:
ALTER TABLE Customer ADD LastName VARCHAR(50);
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Google Maps API v3: How to remove all markers?
...s = new Array();
};
I don't think there is one in V3 so I used the above custom implementation.
Disclaimer: I did not write this code but I forgot to retain a reference when I merged it into my codebase so I don't know where it came from.
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