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Difference between java.util.Random and java.security.SecureRandom
...ource code (JDK 7u2), from a comment on the method protected int next(int bits), which is the one that generates the random values:
This is a linear congruential pseudorandom number generator, as
defined by D. H. Lehmer and described by Donald E. Knuth in
The Art of Computer Programming,...
Check if a variable is a string in JavaScript
...fied though).
This won't work as expected in the case of strings created with new String(), but this is seldom used and recommended against[1][2]. See the other answers for how to handle these, if you so desire.
The Google JavaScript Style Guide says to never use primitive object wrappers.
Doug...
Struct like objects in Java
Is it completely against the Java way to create struct like objects?
20 Answers
20
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Creating a segue programmatically
...
By definition a segue can't really exist independently of a storyboard. It's even there in the name of the class: UIStoryboardSegue. You don't create segues programmatically - it is the storyboard runtime that creates them for you....
Transposing a NumPy array
I use Python and NumPy and have some problems with "transpose":
16 Answers
16
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Sending a message to nil in Objective-C
...entation: I wonder what " sending a message to nil " means - let alone how it is actually useful. Taking an excerpt from the documentation:
...
Why does MYSQL higher LIMIT offset slow the query down?
Scenario in short: A table with more than 16 million records [2GB in size]. The higher LIMIT offset with SELECT, the slower the query becomes, when using ORDER BY *primary_key*
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What's the rationale for null terminated strings?
...ments general rules by a few
conventions. In both BCPL and B a
string literal denotes the address of
a static area initialized with the
characters of the string, packed into
cells. In BCPL, the first packed byte
contains the number of characters in
the string; in B, there is no count
...
Can you help me understand this? “Common REST Mistakes: Sessions are irrelevant”
...m new to the REST school of thought, and I'm trying to wrap my mind around it.
6 Answers
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Asp.net MVC ModelState.Clear
Can anyone give me a succinct definition of the role of ModelState in Asp.net MVC (or a link to one). In particular I need to know in what situations it is necessary or desirable to call ModelState.Clear() .
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