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Difference between java.util.Random and java.security.SecureRandom
...), 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, Volume 3:
Semi...
What's the difference between UTF-8 and UTF-8 without BOM?
...UTF-8 BOM that wasn't UTF-8 (it was CP936). What's unfortunate is that the ones responsible for the immense amount of pain cause by the UTF-8 BOM are largely oblivious to it.
– bames53
Jan 16 '14 at 23:21
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What does an exclamation mark mean in the Swift language?
...This enum describes whether the variable holds a value (Some(T)), or not (None).
If there is a value, this can be obtained by "unwrapping" the variable (obtaining the T from Some(T)).
How is john!.apartment = number73 different from john.apartment = number73? (Paraphrased)
If you write the n...
How to detect if a script is being sourced
...that holds a stack trace of sources, where ${BASH_SOURCE[0]} is the latest one. The braces are used here to tell the bash what is part of the variable name. They are not necessary for $0 in this case, but they do not hurt either. ;)
– Konrad
Jan 22 '16 at 17:23...
Why does flowing off the end of a non-void function without returning a value not produce a compiler
...ur, and in practice it's calling convention and architecture dependent. On one particular system, with one particular compiler, the return value is the result of last expression evaluation, stored in the eax register of that system's processor.
...
How to reset / remove chrome's input highlighting / focus border? [duplicate]
...
You should be able to remove it using
outline: none;
but keep in mind this is potentially bad for usability: It will be hard to tell whether an element is focused, which can suck when you walk through all a form's elements using the Tab key - you should reflect somehow w...
How to pinch out in iOS simulator when map view is only a portion of the screen?
...
Try double tapping with the "Option" key pressed. On the iPhone this causes the MKMapView to zoom out.
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Modify tick label text
...plots()
# We need to draw the canvas, otherwise the labels won't be positioned and
# won't have values yet.
fig.canvas.draw()
labels = [item.get_text() for item in ax.get_xticklabels()]
labels[1] = 'Testing'
ax.set_xticklabels(labels)
plt.show()
To understand the reason why you need to jump...
Passing references to pointers in C++
...nce, which C++ doesn't allow unless the reference is const.
So you can do one of either the following:
void myfunc(string*& val)
{
// Do stuff to the string pointer
}
void myfunc2(string* const& val)
{
// Do stuff to the string pointer
}
int main()
// sometime later
{
// .....
Why are arrays of references illegal?
...s so conspicuously absent from this & similar discussions - is that if one had an array of references, how would one possibly disambiguate between the address of an element & the address of its referent? The immediate objection to 'You can't put a reference in an array/container/whatever' is...