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Using mixins vs components for code reuse in Facebook React
... 0;
}
},
// ...
});
When user presses the submission button, I call validate. A call to validate will run each validator and populate this.state.errors with an array that contains keys of the properties that failed validation.
In my render method, I use hasError to generate correct CSS ...
What is a NullReferenceException, and how do I fix it?
...rammers often make which can lead to a NullReferenceException.
More Specifically
The runtime throwing a NullReferenceException always means the same thing: you are trying to use a reference, and the reference is not initialized (or it was once initialized, but is no longer initialized).
This means t...
`new function()` with lower case “f” in JavaScript
...e here are some examples of instantiation:
1. o = new Object(); // normal call of a constructor
2. o = new Object; // accepted call of a constructor
3. var someObj = new (function () {
var inner = 'some value';
this.foo = 'blah';
this.get_inner = function () {
return inne...
How do I create a parameterized SQL query? Why Should I?
...ith preventing SQL injection. However, most of the time you still have to call them using query parameters or they don't help. If you use stored procedures exclusively, then you can turn off permissions for SELECT, UPDATE, ALTER, CREATE, DELETE, etc (just about everything but EXEC) for the applica...
How do sessions work in Express.js with Node.js?
...) {
console.log(req.cookies['connect.sid']);
}
next(); // Call the next middleware
});
You'll also need to make sure the router (app.use(app.router)) is included after cookieParser and session in your configure section.
The following is an example of the data stored internally by...
How to make fill height
...from. Because your contents would be larger then 1px, the td would automatically grow, as would the div. Kinda a garbage hack, but I bet it would work.
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What is the apply function in Scala?
...ematicians have their own little funny ways, so instead of saying "then we call function f passing it x as a parameter" as we programmers would say, they talk about "applying function f to its argument x".
In mathematics and computer science, Apply is a function that applies
functions to argu...
Get int value from enum in C#
I have a class called Questions (plural). In this class there is an enum called Question (singular) which looks like this.
...
Do you need break in switch when return is used?
...
(for reference: http://php.net/manual/en/function.return.php says:
If called from within a function, the return() statement immediately ends execution of the current function
)
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improv...
EJB's - when to use Remote and/or local interfaces?
... be remote components and the only way to invoke them was to make a remote call, using RMI semantics and all the overhead it implies (a network call and object serialization for every method call). EJB clients had to pay this performance penalty even when collocated in the same virtual machine with ...