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fix typo

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samayo 2017-07-26 04:26:38 -07:00 committed by GitHub
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@ -197,7 +197,7 @@ the comma the regular expression `[0-9]{2}` means: Match exactly 2 digits.
## 2.5 Character Group ## 2.5 Character Group
Character group is a group of sub-pattern that is written inside Parentheses `(...)`. As we discussed before that in regular expression Character group is a group of sub-pattern that is written inside Parentheses `(...)`. As we discussed before that in regular expression
if we put quantifier after character than it will repeats the preceding character. But if we put quantifier after a character group than if we put quantifier after character then it will repeat the preceding character. But if we put quantifier after a character group than
it repeats the whole character group. For example the regular expression `(ab)*` matches zero or more repetitions of the character "ab". it repeats the whole character group. For example the regular expression `(ab)*` matches zero or more repetitions of the character "ab".
We can also use the alternation `|` meta character inside character group. For example the regular expression `(c|g|p)ar` means: lowercase character `c`, We can also use the alternation `|` meta character inside character group. For example the regular expression `(c|g|p)ar` means: lowercase character `c`,
`g` or `p`, followed by character `a`, followed by character `r`. `g` or `p`, followed by character `a`, followed by character `r`.