How to search a unicode character using its code point in sublime text

Question

From what I understand, unicode characters have various representations.

e.g., code point or hex byte (these two representations are not always the same if UTF-8 encoding is used).

If I want to search for a visible unicode character (e.g., 汉) I can just copy it and search. This works even if I do not know its underlying unicode representation. But for other characters which may not be easily visible, such as zeros width space, that way does not work well. For these characters, we may want to search it using its code point.

My question

If I have known a character's code point, how do I search it in sublime text using regular expression? I highlight sublime text because different editors may use different format.

Answer 1

1. Zero width space characters can be found via:

\x{200b}

Demo

2. Non breaking space characters can be found via:

\xa0

Demo

Answer 2

For unicode character whose code point is CODE_POINT (code point must be in hexadecimal format), we can safely use regular expression of the format \x{CODE_POINT} to search it.

General rules

For unicode characters whose code points can fit in two hex digits, it is fine to use \x without curly braces, but for those characters whose code points are more than two hex digits, you have to use \x followed by curly braces.

Some examples

For example, in order to find character A, you can use either \x{41} or \x41 to search it.

As another example, in order to find 我(according to here, its code point is U+6211), you have to use \x{6211} to search it instead of \x6211 (see image below). If you use \x6211, you will not find the character 我.