How to improve regex? -

How to improve regex? -

i need write regular look match characters: a-z a-z 0-9 .!$%&-_@# without whitespace , in possible order knowledge of regular look lets closer 0 expert. , there need @ to the lowest degree 1 digit, 1 special character , 1 letter.

what able create on own:

[\s\w\.!$%&-_@#][^ ]{6,}

but i'm not sure it'll work assumed.

question:

how can create match entire word not part of it?

edit: i've tested , it's not meet that:

and there need @ to the lowest degree 1 digit, 1 special character , 1 letter.

examples:

not matching:

as1@.&%~+

asd dfgf

axf1345

1s4%z_-@#$ .!$%&-_@#

correct:

a1s#@%._

1acf3%&

abloct2$

@anubhava answer:

^(?=.*?[0-9])(?=.*?[a-za-z])(?=.*?[_.!$%&@#-])[\w.!$%&@#-]{6,}$

you can utilize lookahead based regex:

^(?=.*?[0-9])(?=.*?[a-za-z])(?=.*?[_.!$%&@#-])[\w.!$%&@#-]{6,}$ (?=.*?[0-9]) lookahead ensure there @ to the lowest degree 1 digit (?=.*?[a-za-z]) lookahead ensure there @ to the lowest degree 1 alphabet (?=.*?[.!$%&@#-]) lookahead ensure there @ to the lowest degree 1 special character regex demo

regex