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Why Choose Struct Over Class?
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According to the very popular WWDC 2015 talk Protocol Oriented Programming in Swift (video, transcript), Swift provides a number of features that make structs better than classes in many circumstances.
Structs are preferable if they are relatively small and copiable be...
How do I obtain a Query Execution Plan in SQL Server?
...osoft SQL Server how can I get a query execution plan for a query / stored procedure?
12 Answers
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Check if a class has a member function of a given signature
...h that it has a desired signature. That is where the
illustrated technique scores. The pointerized variant of the desired signature
is inscribed in a parameter of a template type that must be satisfied by
&T::mf for the SFINAE probe to succeed. But this template instantiating
technique gives the...
A simple explanation of Naive Bayes Classification
...earning how to generalize to new examples, would receive misleadingly high scores.
In general, for an example, 70% of our data can be used as training set cases. Also remember to partition the original set into the training and test sets randomly.
Now I come to your other question about Naive Baye...
Tying in to Django Admin's Model History
...swer and agree with him, it is pretty limited.
In my opinion a stronger approach is to use the code from Marty Alchin in his book Pro Django (see Keeping Historical Records starting at page 263). There is an application django-simple-history which implements and extends this approach (docs here).
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What's the difference between using “let” and “var”?
...emporal dead zone" from the start of the block until the initialization is processed.
function checkHoisting() {
console.log(foo); // ReferenceError
let foo = "Foo";
console.log(foo); // Foo
}
checkHoisting();
Creating global object property
At the top level, let, unlike var, does not cre...
Local Storage vs Cookies
...ocal storage since they seem to have the same functionality. Are there any pros/cons (especially performance-wise) in using local storage to replace cookie functionality except for the obvious compatibility issues?
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Android accelerometer accuracy (Inertial navigation)
...y recommend this video.
It is not the accelerometer noise that causes the problem but the gyro white noise, see subsection 6.2.3 Propagation of Errors. (By the way, you will need the gyroscopes too.)
As for indoor positioning, I have found these useful:
RSSI-Based Indoor Localization and Trackin...
How do Trigonometric functions work?
So in high school math, and probably college, we are taught how to use trig functions, what they do, and what kinds of problems they solve. But they have always been presented to me as a black box. If you need the Sine or Cosine of something, you hit the sin or cos button on your calculator and you'...
How much of a git sha is *generally* considered necessary to uniquely identify a change in a given c
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This question is actually answered in Chapter 7 of the Pro Git book:
Generally, eight to ten characters are more than enough to be unique
within a project. One of the largest Git projects, the Linux kernel,
is beginning to need 12 characters out of the possible 40 to stay...