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Lock-free multi-threading is for real threading experts
...based solution can be easier to reason about, easier to implement and less error-prone than a half-baked locking implementation that tries to be smart. (It is however - subjectively - also true for an STM based solution.) I would also bet that it is light-years easier to correctly write a decent dis...
Peak signal detection in realtime timeseries data
...eshold that makes the algorithm signal when you want it to (some trial-and-error might be needed here to get to a good threshold for your purpose).
WARNING: The code above always loops over all datapoints everytime it runs. When implementing this code, make sure to split the calculation of the sign...
Why is my variable unaltered after I modify it inside of a function? - Asynchronous code reference
...etime in the future, when the file has been read successfully or thrown an error.
In all cases, we have a callback which may run sometime in the future. This "sometime in the future" is what we refer to as asynchronous flow.
Asynchronous execution is pushed out of the synchronous flow. That is, t...
How does the ARM architecture differ from x86? [closed]
...e string bytewise */
while on ARM shortest form might look like (without error checking etc.)
top:
ldrb r2, [r0, #1]! /* load a byte from address in r0 into r2, increment r0 after */
ldrb r3, [r1, #1]! /* load a byte from address in r1 into r3, increment r1 after */
subs r2, r3, r2 /* subtract...
What does the Reflect object do in JavaScript?
...ther return obj when the property was successfully defined, or throw a TypeError otherwise, Reflect.defineProperty(obj, name, desc) is specced to simply return a boolean that indicates whether or not the property was successfully defined. This allows you to refactor this code:
try {
Object.define...
使用虚拟现实和App Inventor进行实验 · App Inventor 2 中文网
...ptions);
} catch (IOException e) {
Timber.e("Error loading image", e);
}
return true;
}
}
当然，我们不应该忘记活动的生命周期，以及在活动被销毁时清理资源的需要：
@Override
protected void onPause()...
Is JavaScript a pass-by-reference or pass-by-value language?
...ng; if it was passed by const ref trying to do changeObject would cause an error, rather than just failing. Try assigning a new value to a const reference in C++ and the compiler rejects it. In user terms, that's the difference between pass by value and pass by const reference.
...
How do I create a simple 'Hello World' module in Magento?
...oper mode" (google it). With developer mode on, Magento will crash on any errors in XML files.
– Alan Storm
May 4 '13 at 4:53
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Referring to the null object in Python
...e same object, which makes None a singleton. Newcomers to Python often see error messages that mention NoneType and wonder what it is. It's my personal opinion that these messages could simply just mention None by name because, as we'll see shortly, None leaves little room to ambiguity. So if you se...
Why is transposing a matrix of 512x512 much slower than transposing a matrix of 513x513?
...3: 1214.06; 8192: 1171.62ms, 8191: 1351.07ms - that's inside the margin of error, the fluctuations are in the 100ms area; this "benchmark" isn't something that I'd be too comfortable with if we wanted completely accurate values])
[1] Sources for this stuff: Well if you can't get a lecture from some...