正则表达式捕获至少有一个小写字母的单词

Question

I'm trying to capture words in a string like:

1vTvFpU
KOoy6Cc

With regex pattern:

\b(?=(?:.*?[a-z]){1,})[A-Za-z0-9\/\-_.]{7,7}\b

But I have a problem because it also matches words like:

FDSFDFI
WEWEFDP
RRRRRRR

In a string:

FDSFDFI sdfdfdf
WEWEFDP traliii
RRRRRRR sdfdfdf

What Am I doing wrong?

Answer 1

I suggest you to use \S* instead of .* inside the lookahead. Because when you include .*? inside the lookahead, it checks for atleast one lower-case letter for the whole line not for the word.

\b(?=(?:\S*?[a-z]))[A-Za-z0-9\/\-_.]{7}\b

{7,7} is equal to {7}

DEMO