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基礎篇
Regular Expression
(31:16)
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by Solomon, 2010-07-14 20:49, 人氣(4381)
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標題
1.
NCNU Linux User Group 2010 <Regular Expression>
2.
Outline
3.
What’s a Regular Expression?
4.
The Purpose
5.
What’s grep?
6.
Slide 6
7.
alias & unalias
8.
Various Operators
9.
1. [ ] presents any one character among those characters inside.
10.
2. [ - ] presents any one character among the code range.
11.
2. [ - ] presents any one character among the code range.
12.
2. [ - ] presents any one character among the code range.
13.
2. [ - ] presents any one character among the code range.
14.
2. [ - ] presents any one character among the code range.
15.
3. [^ ] represents the characters not in the range of a list.
16.
4. ^ Matches the empty string at the beginning of a line.
17.
3. [^ ] represents the characters not in the range of a list.
18.
4. ^ Matches the empty string at the beginning of a line.
19.
5. $ Matches the empty string at the end of a line.
20.
6. . Matches any single character.
21.
7. * The preceding item will be matched zero or more times.
22.
Extended Regular Expressions
23.
7. * The preceding item will be matched zero or more times.
24.
Extended Regular Expressions
25.
1. + The preceding item will be matched one or more times.
26.
2. ? The preceding item will be matched zero or one time.
27.
3. | represents the preceding item or the following item.
28.
4. ( ) represents group strings.
29.
5. {N} The preceding item is matched exactly N times.
30.
6. {N, } The preceding item is matched N or more times.
31.
7. {N,M} The preceding item is matched at least N times, but not more than M times.
32.
6. {N, } The preceding item is matched N or more times.
33.
5. {N} The preceding item is matched exactly N times.
34.
6. {N, } The preceding item is matched N or more times.
35.
7. {N,M} The preceding item is matched at least N times, but not more than M times.
36.
Exercises
37.
7. {N,M} The preceding item is matched at least N times, but not more than M times.
38.
Exercises
39.
7. {N,M} The preceding item is matched at least N times, but not more than M times.
40.
Exercises
41.
References
42.
Exercises
43.
7. {N,M} The preceding item is matched at least N times, but not more than M times.
... [more]
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