/regex/
litteral match
/regex|moreregex/
Literal match w/ different possibilities
/?/
lazy search
/^a/
returns a if first
/a$/
returns a if last
 
/(?=a)/
returns if a is present
/(?!a)/
returns if a is NOT present
 
/./
wildcard character
/a?/
a optional
 
/[a+]/
a or aa as single match (1 or more)
/[Aa*]/
Aa or A as single matches (0 or more)
 
/[A-z]{a,b}/
min a, max b
/[A-z]{x,}/
min x times
/[A-z]{x}/
only x times
/[A-z],{x}/
max x times
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