Lvalue and Rvalue are terrible names. They are due to historical reasonal but people stuck with these names.
A lvalue reference has a name while a rvalue reference has no name, in other words, a lvalue reference is persistent while a rvalue reference is …
There are several different ways to copy arrays of object (primitive types) in Java.
However,
the fastest way seems to be System.arraycopy.
This methed is implemented using native code and only performs a shallow copy.
Acutally most methods for copying arrays in Java perform shallow copy.
int arr1[] = {0 …int i = b ? 1 : 0; convert a boolean value b into an integer value i,
and boolean b = i != 0 convert an integer value i into a boolean value …A string is essentially a sequence of characters. This is how string is implemented in many programming languages (string in Java is different). For this reason, you can operate string like an array in some programming languages. This post is a shallow summary on strings in different programming languages. For …
I have decided to try different programming languages. I learn Python a month ago. I would like to say that Python is great scripting language. The only thing I do not like so far is inconsistent about methods and functions. It is annoying to remember whether a call should be …
It is recommend to always use {} if even there is only one statement inside it.
The reason is that you never know whether you are going to add more statements into it or not.
And it will make the code more readable.
Feel free to declare the …