Regex
Control characters
Control sequence
Examples
Metacharacters
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[adb] Search for places where a or b or c exists
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[^adb] Search for places where a or b or c DOES NOT exist
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[a-f] Search for places where a,b,c,d,e,f exists
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[A-z] Search for places where A-Z,a-z,and all ascii codes between Z-a
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[9-0] Invalid. [0-9] is valid.
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[.?] [.+] Dot plus quantifier = slow