Unable to match one or more whitespaces in Vim

Question

I want match spaces at the beginning of lines in Vim

PseudoCode of what I want to do

^( )*

I know the following fr

Answer 1

I think you can really do is match spaces until some kind of non-space character, right? Try this:

^\( \+\)

Or, for any kind of whitespace:

^\(\s\+\)

In Vim regex (, ) and + need to be escaped. Also, if you planning to use backreference, the syntax is \1 (the first group, for example) and not $1 like Perl.