Regular Expressions 101

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/
(\S)(.)1.0"\s401(.)
/
1st Capturing Group
(\S)
\S
matches any non-whitespace character (equivalent to [^\r\n\t\f\v ])
+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
2nd Capturing Group
(.)
.
matches any character (except for line terminators)
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
1 matches the character 1 literally (case sensitive)
. matches any character (except for line terminators)
0" matches the characters 0" literally (case sensitive)
\s
matches any whitespace character (equivalent to [\r\n\t\f\v ])
+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
401 matches the characters 401 literally (case sensitive)
3rd Capturing Group
(.)
.
matches any character (except for line terminators)
Your regular expression does not match the subject string.Try launching the debugger to find out why.

Regular Expression
No Match

/
/

Test String