Capture 0.0.0.0-255.255.255.255 IP address octets. Capture private ranges, such as '169.254.' and '10.'

Es mi intento por detectar urls

convert link of filtered text to html tag link

This one removes ALL attributes if "style" is found. See my other expression to only remove the style.

Mathces unnecessary spaces in computer programs.

Must have at leat one number, at leat one capital letter, at least one lower case letter. Also you can have special characters !.@$%&+=-? if you want for extra security. This is not manditory. Change (?=.[a-z\!.@$%&*+=\-\?]) to (?=.[\!.@$%&+=\-\_?]) to make thees special characters manditory. No le...

if(a)

easy syntax check for equation

check if two operator follow and if two [xX] follow. You can combine this with https://regex101.com/r/qT7fO0/1

This is able to match both side of an equation.