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Why is the String class declared final in Java?
From when I learned that the class java.lang.String is declared as final in Java, I was wondering why that is. I didn't find any answer back then, but this post: How to create a replica of String class in Java? reminded me of my query.
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What is the difference between quiet NaN and signaling NaN?
...m operations. But I can't understand what these are concepts exactly. What is the difference between them?
2 Answers
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How to deploy correctly when using Composer's develop / production switch?
..., so the tools will not be installed in production (on the live server). This is (in theory) very handy for scripts that only make sense in development, like tests, fake-data-tools, debugger, etc.
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Multidimensional Array [][] vs [,] [duplicate]
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One is an array of arrays, and one is a 2d array. The former can be jagged, the latter is uniform.
That is, a double[][] can validly be:
double[][] x = new double[5][];
x[0] = new double[10];
x[1] = new double[5];
x[2] = new ...
Do I have to guard against SQL injection if I used a dropdown?
... something as simple as the following example to make sure the posted size is what you expect.
$possibleOptions = array('All', 'Large', 'Medium', 'Small');
if(in_array($_POST['size'], $possibleOptions)) {
// Expected
} else {
// Not Expected
}
Then use mysqli_* if you are using a versio...
Why doesn't Python have a sign function?
...ave a sign function. It has an abs builtin (which I consider sign 's sister), but no sign .
12 Answers
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How do emulators work and how are they written? [closed]
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Emulation is a multi-faceted area. Here are the basic ideas and functional components. I'm going to break it into pieces and then fill in the details via edits. Many of the things I'm going to describe will require knowledge of the ...
What is an ORM, how does it work, and how should I use one? [closed]
... that I'm designing, but I'm having trouble finding information on what it is or how it works.
5 Answers
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FirstOrDefault: Default value other than null
...a Default value of something other than null. What I haven't worked out is what kind of things other than null can be returned by this (and similar) method when there are no items in the query result. Is there any particular way that this can be set up so that if there is no value for a particul...
Tricky Google interview question
A friend of mine is interviewing for a job. One of the interview questions got me thinking, just wanted some feedback.
21 A...