=~ judges if a sting is in accordance with a regular expression format.

• Expression: <string> =~ "<regexp>"
• Left operand: string
• Right operand: regular expression

Constant

Example: judge if String "adfAWa" is composed of uncapitalized letters.

return "adfAWa" =~ "^[a-z]+$"

Alias

Example: find 10 email addresses and judge if their formats are [email protected] or [email protected]

find().nodes({@email}) as n
limit 10
return n.address, n.address =~ "^[a-zA-Z0-9_.-]+@[a-zA-Z0-9]+\.(com|cn)$"

Property

Example: find 10 email addresses whose formats are [email protected] or [email protected]

find().nodes({@email.address =~ "^[a-zA-Z0-9_.-]+@[a-zA-Z0-9]+\.(com|cn)$"}) as n
limit 10
return n{*}