F.5 Examples of using regular expressions

character-string

Match lines containing the specified string.

spring

spring has come.

Yes

winter-summer-autumn-spring

Yes

---- spring -----

Yes

^ character-string

Match lines beginning with the specified string.

^spring

spring has come.

Yes

winter-summer-autumn-spring

--

-----spring-----

--

character-string $

Match lines ending with the specified string.

spring$

spring has come.

--

winter-summer-autumn-spring

Yes

-----spring-----

--

^ character-string $

Match lines consisting of the specified string only.

^spring$

spring has come.

--

winter-summer-autumn-spring

--

spring

Yes

spring

--

^$

Match null lines.

^$

Yes

spring

--

. (period)

Match any character.

in.e

winter has come.

Yes

mother of invention

Yes

life is in everything

Yes

eight nine ten

--

increasing population

--

s..ing

picnic in spring

Yes

skiing in winter

Yes

[character-string]

Signifies any of the characters specified in the string enclosed by [ and ].

[pr]

spring has come.

Yes

today is Monday.

--

[character-character]

Signifies a single character within the range, in the ascending order of character codes.

[a-i]

spring has come.

Yes

[character-character]

Signifies a single character out of the range, in the ascending order of character codes.

[^a-i]

spring has come.

Yes

character *

Match strings containing zero or more repetitions of the preceding characters.

ro*m

terminal

Yes

cd-rom

Yes

living room

Yes

h.*n

This is a pen.

Yes

That is an apple.

Yes

regular-expression | regular-expression

Signifies either of the right and left regular expressions.

[0-9]+|apple

That is an apple.

Yes

spring in 2003

Yes

\ special-character

Handles a special character as an ordinary character.

o\.h

<stdio.h>

Yes

another man

--

(regular-expression)

Groups regular expressions.

i(n.e|ng)

winter has come.

Yes

interesting book

Yes