Why Is There No Char.Empty Like String.Empty

Why is there no Char.Empty like String.Empty?

There's no such thing as an empty char. The closest you can get is '\0', the Unicode "null" character. Given that you can embed that within string literals or express it on its own very easily, why would you want a separate field for it? Equally, the "it's easy to confuse "" and " "" arguments don't apply for '\0'.

If you could give an example of where you'd want to use it and why you think it would be better, that might help...

How does one represent the empty char?

You can use c[i]= '\0' or simply c[i] = (char) 0.

The null/empty char is simply a value of zero, but can also be represented as a character with an escaped zero.

Why is there no empty char literal?

To give a slightly more technical explanation: There is no character that can serve as the identity element when performing concatenation. This is different from integers, where 0 serves as the identity element for addition.

How to replace a char in string with an Empty character in C#.NET

You can use a different overload of Replace() that takes string.

val = val.Replace("-", string.Empty)

In java i tried replace char with ''. But it's showing Empty Literal Character error

You can't have a character representing nothing. You need a character sequence of length zero, i.e. an empty string.

As such, your first argument also needs to be converted to use the String, String signature.

name = name.replace(Character.toString(name.charAt(i)), "");

String.Split(), empty strings and method deleting specified characters

string.Split() method:

" ".Split(); will result in an array with 2 string.Empty items as there is nothing (empty) on either side of the space character.

" something".Split(); and "something ".Split(); will result in an array with two items, that one of them is an empty string, and actually one side of the space character is empty.

"a  b".Split(); //double space in between

The first space has a on the left side and an empty string on the right side (the right side is empty because there is another delimiter right after), the second space, has an empty string on the left side and b on the right side. so the result will be:

{"a","","","b"}

Copying a string into an empty string without using a lib function

You're found out why C++ is so much easier, with std::string. Doing this manually, the old-fashioned way is fraught with dangers. The new way is just stack = p; Literally, it's that simple.

stack is not an "empty string" in your code. It's a char[1]. You cannot copy any characters into it, because that one char is needed to hold the \0. C arrays, unlike std::string have a fixed length.



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