Regular Expressions
.
|
Any
single character
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*
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0
or more of the preceding character
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+ \+
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One
or more of the preceding character
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? \?
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0
or 1 of the preceding character
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{ } \{ \}
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Match
exactly num of the preceding character:
{x}- match x repetitions
{x,} match x or more
{,x} match 0 – x repetitions
{x,y} match x to y repetions
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^
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Match
Beginning of line
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$
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Match
End of line
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< \<
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Match
Beginning of word
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> \>
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Match
End of word
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[ ]
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Range
– match any character within the range
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[^ ]
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Negation
– match any character NOT within the range
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( ) \( \)
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Group
a pattern as a single entity
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\1 ... \9
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Match
group \#
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| \|
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Separate
choices to match (| is the c-language token for logical OR)
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The following have special meaning only in replacement
patterns
|
|
&
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Reuse
the search pattern as the current replacement pattern
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\u
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Convert
first character of replacement pattern to uppercase
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\U
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Convert
entire replacement pattern to uppercase
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\l
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Convert
first character of replacement patter to lowercase
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\L
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Convert
entire replacement pattern to lowercase
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