date should be in format YYYYMMDDHHMMSS

Identifies two groups, each group using a regex, then replaces group 2 with group 1.

Extract port from URL

Letras, Ñ, acentos, números, guión y barra baja

Grep the daily purchase price for 250 g gold from http://www.scheideanstalt.de/aktuelle-ankaufskurse/ankaufskurse-barren/: gold=$(wget -q -O- http://www.scheideanstalt.de/aktuelle-ankaufskurse/ankaufskurse-barren/ | grep "250 g" | sed -r 's/^.250 g]>([0-9]+)\.([0-9]+[0-9]+[0-9]+)\,([0-9]+[0-9]+).*$...

replace token like [foo:bar:ba zz]

search text matching any word

match the most common url stuctures

Validates a string for valid cron schedules such as 10:45, 11:15 etc.

Verifies a cron schedule pattern such as: 10:45 or multiple times such as: 11:00 22:10 23:15

tests for valid social security numbers according to the social security administration. more specifically: -disallows a group to have all 0s -disallows first group to have all 6s -disallows a ssn to begin with 9 note that this does not test for issued ssn's. that would be impossible to implement h...