Dots

• A dot is a point, a point can point to anything
• \ to escape a backslash for a dot, to make a dot unspecial

Optionals

• • : 0x1 = 0 (zeoro or more)
• • : 0+1 = 1 (one or more)
• ? : do you want it or not ?

Greediness

• 1.*9 : match all, and stop
• 1.*?9 : match the minimum amount, and stop
• 1.+?9 : match 2 match, and stop