JavaScript match method

[John La]

This is my problem:

console.log("    $".match("/^/s{4}\$/"));

This produces "null!". I thought the string backslash might need to be doubled, so I tried this:

console.log("    $".match("/^/s{4}\\$/"));

"null" also. Clearly, there's something I'm missing (my alopecia is acting up).

Thanks in advance.

[Bear Bibeault]

Two things:

1. When using regular expressions, it's best to use RE literals versus strings when you can. That way you get syntax checking, and avoid string escaping woes.

2. \s

So:

"    $".match(/^\s{4}\$/)

[John La]

Yours works, but I need the string version of the regular expression, which is causing me grief.

[Bear Bibeault]

"    $".match("^\\s{4}\\$")