How to create a regular expression that requires 4 characters and spaces?

Question

I try to have the user enter exactly 4 characters without spaces ... this is what I have:

.[^\s]{4}

but everything I entered says it doesn't match the regex ...

Where am I going wrong?

Answer 1

Why is there another one ahead .? This will match a single character before your “four spaces” are counted.

You might also want to associate it with the beginning and end of a line, so:

^[^\s]{4}$

Answer 2

, , \S, \S, . , :

^[\S]{4}$

:

^ -

[/S] - "S"

{4} - 4

$-

Answer 3

\S{4}

4 . # regex, Expresso.

Answer 4

Java:

[^\s]{4,4}

Answer 5

- /^ [^\s] {4} $/

Answer 6

txt2re.com .