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fastest (low latency) method for Inter Process Communication between Java and C/C++
... passing a single byte with code like this:
MappedByteBuffer mem =
new RandomAccessFile("/tmp/mapped.txt", "rw").getChannel()
.map(FileChannel.MapMode.READ_WRITE, 0, 1);
while(true){
while(mem.get(0)!=5) Thread.sleep(0); // waiting for client request
mem.put(0, (byte)10); // sending the re...
Delete first character of a string in Javascript
...ds the index of the last character, so there's no type coercion performed, and the algorithm ends up being identical. But I do prefer === over == even when it doesn't make a difference. ;)
– user113716
Oct 17 '11 at 21:32
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Is there a Mutex in Java?
...someObject) {
...
}
You can read more about this here: Intrinsic Locks and Synchronization
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a href link for entire div in HTML/CSS
... Hello world
</span>
</a>
which is semantically correct and works as expected but is not a div any more.
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Why doesn't list have safe “get” method like dictionary?
...sociated with names) where it is inefficient to check if a key is present (and return its value) without throwing an exception, while it is super trivial to avoid exceptions accessing list elements (as the len method is very fast). The .get method allows you to query the value associated with a nam...
Embed image in a element
...<button> element in HTML.
The button is the same size as the image, and the image is shown but for some reason not in the center - so it's impossible to see it all.
In other words it seems like the top right corner of the image is located at the center of the button and not at the top right c...
How to override the copy/deepcopy operations for a Python object?
I understand the difference between copy vs. deepcopy in the copy module. I've used copy.copy and copy.deepcopy before successfully, but this is the first time I've actually gone about overloading the __copy__ and __deepcopy__ methods. I've already Googled around and looked through the ...
Best way to find the intersection of multiple sets?
...e", what you are looking for is the reduce function:
from operator import and_
from functools import reduce
print(reduce(and_, [{1,2,3},{2,3,4},{3,4,5}])) # = {3}
or
print(reduce((lambda x,y: x&y), [{1,2,3},{2,3,4},{3,4,5}])) # = {3}
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What is tail recursion?
...cursion, the typical model is that you perform your recursive calls first, and then you take the return value of the recursive call and calculate the result. In this manner, you don't get the result of your calculation until you have returned from every recursive call.
In tail recursion, you perfor...
Exit codes in Python
...ode.
It's fairly likely that the script is never calling the exit method, and that 0 is the default exit code.
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