RegexOne : 정규표현식

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Lesson 1: An Introduction, and the ABCs

Task	Text
Match	abcdefg
Match	abcde
Match	abc

• answer : abc

re.match('abc', text)

Lesson 1½: The 123s

Task	Text
Match	abc123xyz
Match	define "123"
Match	var g = 123;

• answer : 123

re.match('.*123', text) # '.+123'
re.match('.*\d', text) # '.+\d'

Lesson 2: The Dot

Task	Text
Match	abc123xyz
Match	define "123"
Match	var g = 123;

• answer : \.

re.match('.+\.', text)

Lesson 3: Matching specific characters

Task	Text
Match	can
Match	man
Match	fan
Skip	dan
Skip	ran
Skip	pan

• answer : [cmf]an

re.match('[cmf]an', text)

Lesson 4: Excluding specific characters

Task	Text
Match	hog
Match	dog
Skip	bog

• answer : [^b]og

re.match('[^b]og', text)

Lesson 5: Character ranges

Task	Text
Match	Ana
Match	Bob
Match	Cpc
Skip	aax
Skip	bby
Skip	ccz

• answer : [A-Z]

re.match('[A-Z]',text)

Lesson 6: Catching some zzz's

Task	Text
Match	wazzzzzup
Match	wazzzup
Skip	wazup

• answer : z{2}
• solution : waz{3,5}up

re.match('.+z{2}',text)

Lesson 7: Mr. Kleene, Mr. Kleene

Task	Text
Match	aaaabcc
Match	aabbbbc
Match	aacc
Skip	a

• answer : a{2,4}.\D*c$
• solution : aa+b*c+
  or a{2,4}b{0,4}c{1,2}

re.match('a{2,4}.\D*c$',text)

Lesson 8: Characters optional

Task	Text
Match	1 file found?
Match	2 files found?
Match	24 files found?
Skip	No files found.

• answer : \d
  or \? or \d.*\?$
• solution : \d+ files? found\?

re.match('\d.*\?$',text)

Lesson 9: All this whitespace

Task	Text
Match	1. abc
Match	2. abc
Match	3. abc
Skip	4.abc

• answer : \d.\s or \d*\s
• solution : \d\.\s+abc

re.match('\d\.\s+abc',text)

Lesson 10: Starting and ending

Task	Text
Match	Mission: successful
Skip	Last Mission: unsuccessful
Skip	Next Mission: successful upon capture of target

• answer : ^Mission.*\D
• solution : ^Mission: successful$

re.match('^Mission.*\D',text)

Lesson 11: Match groups

Task	Text	Capture Groups
Capture	file_record_transcript.pdf	file_record_transcript
Capture	file_07241999.pdf	file_07241999
Skip	testfile_fake.pdf.tmp

• solution : ^(file.+)\.pdf$

re.match('^(file.+)\.pdf$',text)

Lesson 12: Nested groups

Task	Text	Capture Groups
Capture	Jan 1987	(Jan 1987) (1987)
Capture	May 1969	(May 1969) (1969)
Capture	Aug 2011	(Aug 2011) (2011)

• answer : ((\D+)(\d{4}))
• solution : (\w+ (\d+))

re.match('((\D+)(\d{4}))',text)
re.match('(\w+ (\d+))',text)

Lesson 13: More group work

Task	Text	Capture Groups
Capture	1280x720	1280 720
Capture	1920x1600	1920 1600
Capture	1024x768	1024 768

• answer : (\d{4})x(\d{3,4})
• solution : (\d+)x(\d+)

re.match('(\d{4})x(\d{3,4})',text)
re.match('(\d+)x(\d+)',text)

Lesson 14: It's all conditional

Task	Text
Match	I love cats
Match	I love dogs
Skip	I love logs
Skip	I love cogs

• answer : I love +(cats|dogs)

re.match('I love +(cats|dogs)',text)

Lesson 15: Other special characters

Other special characters