Regular Expressions 101

Explanation

Pro

^start of line

Positive Lookahead(?=.*spe*d)

.*any character (except for line terminators), repeated any number of times

spthe literal text sp (case insensitive)

e*the literal e (101₁₀ / 145₈ / 65₁₆) (case insensitive), repeated any number of times

dthe literal d (100₁₀ / 144₈ / 64₁₆) (case insensitive)

.*any character (except for line terminators), repeated any number of times

enginethe literal text engine (case insensitive)

.*any character (except for line terminators), repeated any number of times

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

^(?=.*spe*d).*engine.*

Spd_Engine          #Ok
speedengine         #Ok
enginespd           #Ok
Engine_speed        #Ok
aps_speed_engine    #Ok
engine_speed        #Ok
engine_trq          #Not Ok
speed_rpm           #Not Ok