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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?
...
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
...
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...
Java 8: performance of Streams vs Collections
...he list using iterator.
Stop writing benchmarking code by hand, use JMH.
Proper benchmarks:
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@BenchmarkMode(Mode.AverageTime)
@OperationsPerInvocation(StreamVsVanilla.N)
public class StreamVsVanilla {
public static final int N = 10000;
static List<...
What is the __del__ method, How to call it?
...d. The main reason for that is that I do not know how this method is used, probably not like that: obj1.del() . So, my questions is how to call the __del__ method?
...
Reverse a string in Python
...
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edited Feb 25 '14 at 2:13
Mokolodi1
11911 ...
How do I make a Git commit in the past?
... commit inside --index-filter.
You are dealing with multiple, independent problems here.
Specifying Dates Other Than “now”
Each commit has two dates: the author date and the committer date. You can override each by supplying values through the environment variables GIT_AUTHOR_DATE and GIT_COM...
When to use EntityManager.find() vs EntityManager.getReference() with JPA
...e state (I mean setter method). As you should know, getReference returns a proxy object which uses a powerful feature called automatic dirty checking. Suppose the following
public class Person {
private String name;
private Integer age;
}
public class PersonServiceImpl implements Person...