At least 6 chars with 1 upper/lower case letter and 1 special char

Contains between 6 and 20 characters

Email Validation regex for RFC-2822

\b can be replicated as (?<=\w)(?=\W)|(?<=\W)(?=\w) Understanding how to create these class transitions can be beneficial for several reasons. In this instance, counting the results of this regex can be used to measure randomness within strings containing multiple character classes.

Regex to parse ETS364 Minidiags. 9C RELAY, VI to BUSA Open, K4A2 or K5A2, I2 Chan2 EXP= 20.000 +/-0.600mA ACT= 19.998mA RES=APU12 34/p2 SN: 1967 9C RELAY, VI to BUSB Open, K4A2 or K6A2, V1 Chan2 EXP= 2.00000 +/-0.057 V ACT= 1.99993 V RES=APU12 34/p2 SN: 1967 9C RELAY, V...